Merge branch 'hotfix/classifier'
Merge branch 'release/2.0.1'
Merge branch 'release/2.0.2'
Merge branch 'release/2.0.3'
Merge branch 'develop'
Merge branch 'release/2.1.1'
Merge branch 'release/2.1.2'
Merge branch 'release/2.1.4'
Merge branch 'release/2.1.4.1'
Fix CheckBox validation to a proper boolean
Merge pull request #23 from toscawidgets/fix_checkbox

Fix CheckBox validation to a proper boolean
Merge pull request #24 from toscawidgets/master

Merge @moschlar's hotfix back into develop.
Version bump for @moschlar's hotfix.
@ralphbean noted, better this way
2.2.0
Merge branch 'release/2.2.0' into develop
Metadata fixups, tw2.core#90
Add a template for the ImageButton.
Py3 fixups in the templates.
Ask travis to start doing py3.3 for us.