1.10.1 changes (Iriel)

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== Upcoming 1.10.1 changes ==
* Updated CheckBox:SetCheckedTexture to accept a texture object like the other texture functions. 
* Slider:SetThumbTexture(Texture or "texturePath") 
* Fixed overall script memory usage increase in 1.10. 
* Skip UTF-8 byte-order marker at the start of .toc files. 
* Added Lua collectgarbage() function. 
* Fixed CastSpellByName and pet spells when pet is not available (Behaves like 1.9 rather than failing with unknown spell error)