added variables for text color and highlight colors so that these can be quickly standardized or modified in the future.
complete view toolbar, added functioning reset view button and empty play button, changed render view header, and fixed a few style files.
complete view toolbar, added functioning reset view button and empty play button, changed render view header, and fixed a few style files. adding one file left out of last commit.
fixed style issue.
Merge pull request #38 from Kitware/view-toolbar

View toolbar