More table controls for TinyMCE.
Add a couple table classes which will be added by TinyMCE when generating tables.
Merge pull request #44 from mozilla/default-table-styles

Default Table Styles
Work on #46
Merge pull request #47 from mozilla/46-alter-custom-fields

[46] Adjust Custom Fields
Merge branch 'master' into fxoss-theme
Merge branch 'master' into fxoss-theme
update richtextpage to utilize new CTA fields
resolve merge conflict