added optimizers with various optimizing tools
updated automated image optimization
updated optimizers only to be used for png-file in imagemagick and graphicsmagick
updated optipng optimizer to be compatible with version > 0.7
updated version compare for optipng versions
enhanced img/gm resizing for small images (thumbnail) and large (resize)
graphics: added imageurl class to generate and analyze image urls
refactored imgurl rendering in multiple functions
added short aliases to imgurls
graphics: enhanced alias handling in action parameters
graphics: updated optimizer logic into base optimizer class
graphics: fixed relative img url and added better error handling
graphics: added vim folding to optimizers
changed naming scheme and added extra ->render()->display() call
added read me
graphics: enhanced README
graphics: added some error handling for incorrect/unknown actions
graphics: updated readme