Merge pull request #82 from lqez/master

Add external callbacks with adding image via url
with build files.
There is undo/redo missing.
Fixing lightest gray color.
Merge pull request #84 from extremeFE/master

There is undo/redo missing.
build
Update README.md
Update README.md
Update README.md
Update version
Update version
Fix more color button padding.
Merge branch 'master' of https://github.com/HackerWins/summernote
Merge pull request #85 from extremeFE/master

Fix more color button padding.
Merge branch 'master' of github.com:HackerWins/summernote
Support font-awesome both 4.0 and 3.x
Update README.md
Update README.md
modifier for windows
init bower