v0.5.0

• Fixed And and Or "single argument unwrapping".
• Implemented predicate compression. Example: Or(Or(a, b), c) is converted to Or(a, b, c).
• Renamed the Event.source to Event.fullsource.
• Added Event.source that doesn't do any fancy sourcecode tokenization.
• Fixed Event.fullsource return value for situations where the tokenizer would fail.
• Made the print function available in the PYTHONHUNTER env var payload.
• Added a __repr__ for Event.