Moved test packages to extras_require.
Removed dependency from five.grok.
Tested with Plone-4.3.
Added Travis CI integration.
Release 0.2.2.1
Added host and link.
Separated schema from attributes and methods.
Release 0.2.2.2
Updated version.
Cosmetics
Release 0.2.2.3
feat: method: _set_bool