add deindent() function in both js/lib/beautify.js and python/jsbeautifier/__init__.py .
deindent() is used to reverse the indent() action.
Merge pull request #267 from will-v-king/master

added a deindent() function .
Function and inline statement indentation fixes

I don't like to close multiple bugs in a one shot, but these all tie together and overlap.

Fixes #268
Fixes #275
Fixes #276
Merge remote-tracking branch 'upstream/master' into gh-pages