Consider zoom when culling billboards.

screenScale represents the current zoom factor, but may need some
revision because I'm not sure if what it's doing is technically correct.
It is used to multiply the culling distance for cells, as well as the
fading distance.
Added comment.
Elastic ease fix

Elastic ease used an arcsinus function where it should have used a sinus
function.
Update README.md
Merge branch 'development' of https://github.com/thecelloman/Torque3D
Merge remote-tracking branch 'upstream/master'
Updated README.md

Added information on where to find the pre-compiled versions.
Fix engine API copy/paste errors (typo).
Update squish library to 1.11
Updating libpng to v1.5.14 and zlib to v1.2.7

Since libpng has a dependency upon zlib, both updates were combined for one commit/pull-request.
Merge pull request #250 from thecelloman/updatelibpngandzlib

Updating libpng to v1.5.14 and zlib to v1.2.7
Merge pull request #243 from thecelloman/updatesquish

Update squish
Update TinyXML to v2.6.2
Merge pull request #255 from thecelloman/updatetinyxml

Update TinyXML to v2.6.2
Tools GuiProfile Separation.

This effectively duplicates (where necessary) and moves tools specific GuiProfiles out of the core and into the tools.  This will allow future modifications to either the game guis or tools guis that use these profiles to not conflict with each other.
Remove unused and (partially) unworking UnifiedShell.
Merge pull request #259 from thecelloman/toolsguiseparation

Tools GuiProfile Separation.
Merge pull request #260 from thecelloman/removeUshell

Remove unused and (partially) unworking UnifiedShell.
Relocates several game specific GUIs (with relevant art and scripts) out of the "core".
Merge pull request #264 from thecelloman/gameguisarenotcore

Relocate game specific GUIs  out of the "core"