Added descriptions for 10 functions

allocate, clear, clone, setUseTexture, isUsingTexture, getTextureReference, bind, unbind, loadImage, saveImage
More saveImage descriptions
Documentation for setCompression()
Documentation for getPixels()
Description for getPixelsRef()
Documentation for getColor()
Added documentation for setColor
Added documentation for setFromPixels
Added documentation for resize
Documentation for grabScreen
Added documentation for crop, cropFrom, rotate90, mirror, update
Added documentation for setAnchorPercent
Added documentation for setAnchorPercent, setAnchorPoint, resetAnchor
Added documentation for draw
Added documentation for drawSubsection
Documentation for getWidth, getHeight
Added documentation for bAllocated and isAllocated
Documentation for reloadTexture
Added documentation for loadFont, isLoaded, isAntiAliased, and hasFullCharacterSet
Added documentation for getSize, getLineHeight, setLineHeight, getLetterSpacing, setLetterSpacing