Merge pull request #75 from Cito/develop

Simplify the validator API and make it compatible with FormEncode (#65).
2.1.4

For Issue #65
Merge branch 'release/2.1.4' into develop
Make sure future-queued resources make it into the middleware.
2.1.5
Merge branch 'release/2.1.5' into develop
Support more webob versions.  Fixes #77
Constrain webtest version for py2.5.
Port to python2/python3 codebase.
Travis-CI config update.
Some py3 fixes for tw2.forms.
@moschlar on the ball.
Some setup for a port of tw2.devtools to gearbox.
Merge branch 'feature/2.2' into develop
Mention tw2.core.DirLink in the docs.  Fixes #69.
Reference gearbox tw2.browser in the docs.

Relates to #81.
Include translations in distribution.