Fixed toColor function returning NaN

Tested the 'toColor' function with 'ffffff00'.
The returned result (in r,g,b,a) was 1,NaN,1,257.
The correct result should obviously be 1,1,1,0.
The hex substring was being done incorrectly.
Merge pull request #89 from ryanmcnz/patch-1

Fixed toColor function returning NaN
Use createWithFile instead of releasing.
Merge branch 'origin/master'
spine-unity4-tk2d
spine-tk2d now supports whitespace trimmed atlases.
Added skeleton RGBA tint.
Add missing semicolons

Missing semicolons can cause trouble when minifying
or concatenating Javascript sources. The last one
actually did cause trouble when being followed by
an IIFE after concatenation.
Simplified SkeletonData ToString in csharp runtime
Merge pull request #95 from nikibobi/patch-1

Simplified SkeletonData ToString in csharp runtime
Merge pull request #94 from theGoodEvil/missing_semicolons

Add missing semicolons
Don't need mesh.Clear() every frame.
Merge branch 'origin/master'
Don't need to set submesh triangles every frame.
Combined two similar ifs to one with xor
Merge pull request #96 from nikibobi/patch-1

Combined two similar ifs to one with xor
Remove unnecessary if.
Merge branch 'origin/master'
Support premultiplied alpha.
Fixed Flash registration points.