v3.3.0

• Fixed handling so that hunter.event.Event.module is always the "?" string instead of None. Previously it was None when tracing particularly broken code and broke various predicates.
• Similarly hunter.event.Event.filename is now "?" if there's no filename available.
• Building on the previous changes the actions have simpler code for displaying missing module/filenames.
• Changed hunter.actions.CallPrinter so that trace events for builtin functions are displayed differently. These events appear when using profile mode (eg: trace(profile=True)).
• Fixed failure that could occur if hunter.event.Event.module is an unicode string. Now it's always a regular string. Only applies to Python 2.
• Fixed argument display when tracing functions with tuple arguments. Closes #88. Only applies to Python 2.
• Improved error reporting when internal failures occur. Now some details about the triggering event are logged.