Merge pull request #38 from lqez/master

Add toolbar configuration option
Add toolbar configuration option, coding style
Add toolbar configuration option with build file.
Update README.md
Fix height selectbox bug.
Change keyboard shortcut theme.
Change keyboard shortcut theme. debugging
Add range testcase.
Add Range test.
Change indent/outdent shortcut(cmd+[, cmd+]).
Fix image sizing info fontsize.
Rearrange default toolbar.
Add Toggle Strike.
Fix #35 with queryCommandState.
Fix #43. focus editable before calling execCommand.
Range: textRange for interface. TODO: bp2textRange, textRange2bp.
Update README.md
Add resizebar.
Update README.md
implement bp2textRange