updates gitignore
update docs with new option
iupdates messages
newer version of coffeescript compilation
adds new flag for separate stylesheets
move "generated by iconr" header string into createCssRules method
added nopngdata option to docs
added nopngdata option flag to cli
allow option to suppress the creation of data-uri for PNGs for IE8
write execptions for nopng and nopngdata option flags
remove separate stylesheet option from docs so that iconr can be released in current form
0.3.0