Mwtemplates

- Fix install on Py3.x with non-UTF8 locale
- Drop support for Python 2.6 and Python 3.2
- Fix `__repr__` encoding, 4
- Add logging NullHandler, 4

- Don't parse templates inside pre tags

- Fix memory leaks

- Don't crash on empty templates `{{}}`

- Add more methods to the `Parameters` class: `get()`, `keys()`, `items()`, `iteritems()`, `index()`
- Let `Parameters.remove()` accept `Parameter` object as well as string
- Let parameter comparison ignore type (while all parameters are really strings, it's convenient to be able to compare with integers as well)
- Cleanup setup code

- Improved method for guessing whitespace pattern for new arguments based on existing arguments
- Fix whitespace preservation when editing empty-valued parameters
- Add `.remove()` method to `Parameters`