Fix "silent" error handling in the TableData.__init__ to prepend the complete traceback and show original exception for Python 2.x. Previously it was impossible to debug query-time issues with django_tables2.
Fix the syntax to be parseable under py3
Ooops, forgot the parens.
Replace the exception dance with light input validation.
Merge pull request #165 from ionelmc/master

Fix "silent" error handling in the TableData.__init__