small changes to add -box and unit in css
Merge pull request #417 from kusl/patch-1-css

small changes to add -box and unit in css
#266 - Added automatic paired characters
Removed unnessecary code, which was added for the paired characters work.
Removed a block of commented code..
Merge pull request #420 from scottg1989/pairedchars

#266 - Added automatic paired characters
#422 - fixed close after saving modified document
Merge pull request #423 from BradRem/422

#422 - fixed close after saving modified document