Update rails.
Multiple record of Gempackage in production
Merge pull request #6 from errakeshpd/master

fix #4. Multiple record of Gempackage in production
Use class instead of inline CSS for service item list in tariff item groups.
Let .right and .currency CSS work in tables.
Fix tariff group items to work with reason codes.
Fix contextual_link_to and contextual_links_for calls.
Add duration to tariff_items.
Use duration to lookup tariff item when creating service_records.
Port ServiceRecords to use tariff_item_id as relation key.
Drop dead code in tarmed import model.
Also import duration for tarmed tariff items.
Newest Tarmed MDB gives warning, continue with import anyway.
Fix tariff group item to work with multiple tariff items with same code.
Fix tariff item group view.
Update CHANGELOG.