--User changes

-Allow for pausing the renderer in the main window. This makes is more efficient when entering many parameters, such as when following a tutorial.
 -Add support for new variations: erf, gamma, jac_cn, jac_dn, jac_sn, logDB, pressure_wave, pRose3D, splits3D, w, waves2b, x, xerf, y, z.
 -Inform user of the start and stop of file parsing in EmberAnimate because the files could potentially be very large.
 -Move the follwing fields to a new table called Animation: Interpolation, Affine Interpolation, Temporal Samples, Temporal Filter Width, Temporal Filter Type.
  -These currently have no effect on the interactive renderer and instead are used when running flames through EmberGenome to generate sequences, and then animating them in Fractorium or EmberAnimate.
 -Add new parameter overrides for EmberRender and EmberAnimate which directly assign values to all flames being rendered, rather than scale:
  --quality
  --demin
  --demax

--Bug fixes
 -Left pad instead of right pad names of sequence outputs from EmberGenome.
 -Unique file naming was broken for files which already had an underscore in them.
 -Properly report that png is the default format of EmberRender and EmberAnimate output instead of erroneously claiming it was jpg.
 -Make command line programs search these folders in this order for the palette file:
  ./
  ~/.fractorium
  ~/.config/fractorium
  /usr/share/fractorium
  /usr/local/share/fractorium
 -Fix possible bad values in hexes.
 -Better assignment of Z variables.
 -Fix boarders due to use of poorly implemented rint() function from flam3. Use std::rint() now.
 -wedge_sph was completely wrong due to having accidentally swapped the mapping of two parameters.
 -Make juliascope juliascope_power parameter be of type REAL_NONZERO since it's used as a denominator.
 -Make Z assignment compatible with the originals in:
  -arch, bcircle, bCollide, bent, bent2, bisplit, blob, blur_linear, blur_square, bMod, boarders, boarders2, bSwirl, bTransform, butterfly, cardioid, cell, circleblur, circlize, circlize2, circus, collideoscope, cos, cosine, cosh, coth, cpow, cpow2, crescents, cropn, csc, csch, curl, curve, dc_gridout, deltaa, diamond, disc2, eclipse, eCollide, edisc, eJulia, elliptic, eMod, eMotion, ennepers, epispiral, ePush, eRotate, eScale, eSwirl, ex, exp, expo, exponential, fan, fdisc, fibonacci, fibonacci2, fisheye, flipcircle, flipy, flower, flux, funnel, glynnia, GlynnSim1, GlynnSim2, GlynnSim3, gridout, handkerchief, heart, hole, idisc, julia, julian2, juliaNab, kaleidoscope, lazyTravis, Lissajous, mask, MobiusN, mobius_strip, modulus, murl, murl2, npolar, ortho, oscilloscope, parabola, perspective, petal, phoenix_julia, pie (was also inconsistent between cpu and gpu), poincare, popcorn, popcorn2, power, pow_block, rational3, rays, rblur, rings, rippled, roundspher, sec, secant2, sigmoid, sin, sineblur, sinh, sinusgrid, sphericaln, spiralwing, spirograph, split, squarize, squirrel, squish, sschecks, starblur, stripes, stwin, super_shape, tan, tancos, tangent, tanh, TwinTrian, twoface, unpolar, waves, wavesn, wedge_julia, whorl, xheart, zblur, zscale.

--Code changes
 -Generalize Variation::PrecalcHelper() and rename to PrePostPrecalcHelper().
  --Do the same for the OpenCL version and rename it PrePostPrecalcOpenCLString().
 -Rename Variation::m_AssignType to m_PrePostAssignType since it's only relevant to pre/post variations.

Source/Ember/VariationsDC.h

@@ -140,7 +140,7 @@ public:
 		T h = -m_H + (1 - x0_xor_y0) * m_H;
 		helper.Out.x = m_Weight * (m_Xform->m_Affine.A() * x + m_Xform->m_Affine.B() * y + m_Xform->m_Affine.E());
 		helper.Out.y = m_Weight * (m_Xform->m_Affine.C() * x + m_Xform->m_Affine.D() * y + m_Xform->m_Affine.F());
-		helper.Out.z = (m_VarType == eVariationType::VARTYPE_REG) ? 0 : helper.In.z;
+		helper.Out.z = DefaultZ(helper);
 		outPoint.m_ColorX = fmod(std::abs(outPoint.m_ColorX * T(0.5) * (1 + h) + x0_xor_y0 * (1 - h) * T(0.5)), T(1.0));
 	}
 
@@ -162,7 +162,7 @@ public:
 		   << "\n"
 		   << "\t\tvOut.x = xform->m_VariationWeights[" << varIndex << "] * (xform->m_A * x + xform->m_B * y + xform->m_E);\n"
 		   << "\t\tvOut.y = xform->m_VariationWeights[" << varIndex << "] * (xform->m_C * x + xform->m_D * y + xform->m_F);\n"
-		   << "\t\tvOut.z = " << ((m_VarType == eVariationType::VARTYPE_REG) ? "0" : "vIn.z") << ";\n"
+		   << "\t\tvOut.z = " << DefaultZCl()
 		   << "\t\toutPoint->m_ColorX = fmod(fabs(outPoint->m_ColorX * (real_t)(0.5) * (1 + h) + x0_xor_y0 * (1 - h) * (real_t)(0.5)), (real_t)(1.0));\n"
 		   << "\t}\n";
 		return ss.str();
@@ -588,7 +588,7 @@ public:
 			}
 		}
 
-		helper.Out.z = m_Weight * helper.In.z;
+		helper.Out.z = DefaultZ(helper);
 		outPoint.m_ColorX = fmod(c, T(1.0));
 	}
 
@@ -668,7 +668,7 @@ public:
 		   << "\t\t	}\n"
 		   << "\t\t}\n"
 		   << "\n"
-		   << "\t\tvOut.z = xform->m_VariationWeights[" << varIndex << "] * vIn.z;\n"
+		   << "\t\tvOut.z = " << DefaultZCl()
 		   << "\t\toutPoint->m_ColorX = fmod(c, (real_t)(1.0));\n"
 		   << "\t}\n";
 		return ss.str();
@@ -1242,7 +1242,7 @@ public:
 		// Add blur effect to transform
 		helper.Out.x = m_Weight * vx;
 		helper.Out.y = m_Weight * vy;
-		helper.Out.z = (m_VarType == eVariationType::VARTYPE_REG) ? 0 : helper.In.z;
+		helper.Out.z = DefaultZ(helper);
 		col = m_Centre + m_Range * p;
 		outPoint.m_ColorX = col - Floor<T>(col);
 	}
@@ -1393,7 +1393,7 @@ public:
 		   << "\n"
 		   << "\t\tvOut.x = xform->m_VariationWeights[" << varIndex << "] * vx; \n"
 		   << "\t\tvOut.y = xform->m_VariationWeights[" << varIndex << "] * vy; \n"
-		   << "\t\tvOut.z = " << ((m_VarType == eVariationType::VARTYPE_REG) ? "0" : "vIn.z") << ";\n"
+		   << "\t\tvOut.z = " << DefaultZCl()
 		   << "\t\tcol = " << centre << " + " << range << " * p; \n"
 		   << "\t\toutPoint->m_ColorX = col - floor(col); \n"
 		   << "\t}\n";