Update README.md

Update compatibility information
First shot to support reverse drawing #8
Update README.md
Update README.md
Fix erasing when animation disabled #8
Finalize reverse drawing #8
Fix options
Show order marks before drawing rather than after #10
add waffle.io badge
Merge PR #11
Merge branch 'waffle-iron-master'
Parse groups information #4
Fix IE SVG loading (and a small typo)