Removed submodule ext/TMCeeTestRunner.
Fixed and simplified running C tests.
FilesController: fix check_access type error
Remove erroneous :js => true from a test.
Use webkit instead of selenium again by default.
Clean up database before each test, not after.

Enables studying the DB after a fail.
Merge branch 'tmcee-merge' of github.com:testmycode/tmc-server into tmcee-merge