Merge pull request #1 from robsonsobral/develop

Some little improvements, specially on ImageMagick
Merge pull request #2 from robsonsobral/develop

part 1 of performance improvements
Merge pull request #3 from robsonsobral/develop

part 2 of performance improvements
fix for using outside EE

fix for getDimensions method
dimensions need to be calculated before output paths to allow for using max width/height
don't try to set a transparent index (on GIFs) if the original image didn't have one
fix some issues with remote file handling and missing extensions
gitignore
update changelog and split into seperate file
fix readme linebreaks
readme formatting
getting alignment parameters and passing them ahead
default alignment parameters of 50%, which means center
get alignment parameters
make sure the parameters are numbers between 0 and 100
using the alignment parameters to calc the offset of crop.
adding the alignment parameters to the name of the cache file