added methods to set min&max of a slider
dev doxygen.
Added description for getHeight()
Merge pull request #1 from mlsptn/master

Added description for getHeight()
Added documentation for ofDrawAxis()
Added descriptions for 10 functions

allocate, clear, clone, setUseTexture, isUsingTexture, getTextureReference, bind, unbind, loadImage, saveImage
More saveImage descriptions
Documentation for setCompression()
Update of3dUtils.h
Documentation for getPixels()
Update of3dUtils.h
Description for getPixelsRef()
Documentation for getColor()
doxygen documentation for ofSoundPlayer
Added documentation for ofDrawArrow()
Added documentation for setColor
add note about sound spectrum availability
newlines for extended explanations
brief explanations of FMOD functions in ofSoundPlayer
period line endings for doxygen comments