Move mixins to tb/mixins.styl
Added traversal support to special containers

TableView, TableSectionView, and TabGroups were not behaving correctly
to traversal methods such as find() and children().

Closes #22.
Updated mock TableView to more closely follow Ti

The biggest change is that Titanium does not allow direct access to
TableView.rows. The rows are stored under TableView.data but if a row is
added via appendRow then a default section is created and the row is
added under that section. In that case the table rows are available
under table.data[0].rows.
Updated special containers test to check $.closest
Updated style application to make sure all nested children are included
Merged changes from master
Removed console outputs
Added $.ajax  setting