Merge branch 'release-1.1.0' into develop
Fix non-unicode bind param (#54)

The ING CSV parser now coerces string types to unicode which is the
cause of the error. The warnings module has also been removed to ensure
that the sqlalchemy warning doesn't get promoted to an error.
Add mededelingen field to description (#53)
Update acceptance tests
Add database migration
Pass category acceptance tests
tx assign raises error when category not found
Check if category exists during import
Fix sqlite migration by recreating table
Merge branch 'feature-subcategories' into develop (#24)
Merge branch 'master' into develop
Add alembic files to distribution
Hide alembic log messages (#58)
Add alembic to setup.py dependencies (#59)
Add config file supprt (#55)
Default config is ~/.bdgtrc (#55)
Bump to version 6
Update changelog
Merge branch 'release-6'