Documentation for ofVideoGrabber's base classes.
Merge branch 'master' of git://github.com/openframeworks/openFrameworks into documentation-baseclasses
Additional base class documentation.
Clean up spaces.
Convert spaces to tabs to match existing.
Minor grammar/code example fixes
Merge pull request #21 from mikewesthad/documentation-baseclasses

Minor grammar/code example fixes for documentation
Merge pull request #3338 from bakercp/documentation-baseclasses

ofBaseClass Documentation.