Improve logging
Modify index creation/configuration in reindexer

Gives freedom to subclasses to modify index settings
Edit changelog
Merge pull request #108 from Treora/reindex_config

Modify how reindex sets index configuration
Releasing v0.13
Reindexer shouldn't fail when target exists

It's a common use case to reindex without creating the target. For
instance, after reindexing, an operator may cut over new writes and
then reindex again to ensure any writes that ocurred during the
reindex are replayed to the new index.
PEP8
Make reindex.py executable
Releasing v0.13.1
Bump version to 0.14.0-dev
Fix broken link in README