Add some higher-level methods to mapping unit test.
Higher-level abstractions for defining annotation, tag, and rating mappings...
... as well unit tests.
Add a redirect for Data Source tools, with the goal of subverting mix-mode content blocking in browsers, i.e. accessing http data source from an https Galaxy. Tested as working on Safari 7.0 and FireFox 26. Subverting did not work on Chrome 31.