adds transparent test image. updates readme.
implements support for transparency

progress with #30
inits v0.0.5 branch
tweaks test suite
tweaks tests
modified hslAdjust to hslaAdjust (with alpha)
finished transparency support. closes #30
Merge branch 'transparency' into v0.0.5
Updates read me
updates readme
updates read me
updates read me
implements lwip.create. closes #41
implements image.clone. closes #48
updates docs for 'clone' method
implements image.extract (copy). #36
refactors class names and file structure
implements image.paste (#36)

todo: batch, tests
finishes implementation of 'paste'. closes #36
removes redundant buffer copies. closes #55