Expose toolbar button classes to configuration options
Build distribution files
Merge pull request #73 from tremby/wysihtml5

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This is https://github.com/xing/wysihtml5/pull/461 which I wrote last year some
time, rebased on to your fork.

This patch allows the classes set on toolbar buttons to be set in the wysihtml5
configuration, as `classNameCommandDisabled`, `classNameCommandsDisabled`,
`classNameCommandActive`, `classNameActionActive`. I already have disabled and
active classes provided by Twitter Bootstrap and dont want to trawl through
the source files and apply all relevant styles to wysihtml5-specific classes
too -- this is a very nice short cut.
Update versions and grunt