removed cookies from taskrun. Fixes #660
cleaned up some 'cookies' in tests
Refactor and fixed minor issues with Forbidden/Unauthorized responses
added some fixes to test_web.py missed in previous commit
taskrun authorization unit tests: create, read
taskrun authorization unit tests: update
taskrun authorization unit tests: delete
refactored tests
modified API documentation. TaskRun cookie mention removed, as cookies are no longer used in this point
dumb change to make travis work again
Merge pull request #666 from alejandrodob/cookie-size-issue

cookie size issue
Modifications from the official brand