fixed issue when converting transparent images to non-transparent formats
removed deprecated method
fixed issue when saving files without extension
fixed links
fixed issue with opacity() not retaining transparency with Imagick
added sharpen command
sharpen amount is now optional
set default sharpen value to 10
identifyImage without raw output
fixed issue when cloning Image objects
tiff support
tiff encoding tests
set default output of undefined images to jpeg
switched default color from transparent-black to transparent-white (still 100% transparent)
added static cache() method
allow limitColors to be called with null
fixed bug when resizing exceeds given values
added directory to ignore
added min/max argument validation
Imagick encoder resolves to getImagesBlob