Fixing the incremental update mode.
It will now work correctly once the "all changesets marked as closed" bug is fixed in the changeset dump generator.
Code clean up
No functional changes
Adding bzip2 support.
This closes #5.
Switching from xml.sax to lxml for parsing.
Drastically reduces time taken to parse XML. Incremental updates went from an hour to under 10 minutes.
Fixes issue #6
Refining output formatting.
Refactoring some things for future functionality
Updating readme to reflect new speedier XML parser and changing dependencies.
PEP8
Add a basic gitignore file
Merge pull request #8 from yohanboniface/pep8

Merging some PEP8 cleanup
Merge pull request #9 from yohanboniface/gitignore

Add a basic gitignore file
Improving memory usage.
Should only need ~20 MB now