[#58098914] added investment features
renamed features that aren't ready to be worked on yet
[#68929500] misc clean up in 'add commodity' feature, added Commodities to the primary nav
added html-rails gem and configured generator to create haml templates instead of erb
[#68929500] created commodities controller and spec shell
[#68929500] worked commodities spec to the point a model is required
[#68929500] created commmodity model
[#68929500] corrected typo
[#68929500] working the commodities controller spec
[#68929500] working the commodities controller spec
[#68929500] finished working the commodities controller spect
[finishes #68929500] finished making the 'add commodity' feature pass
renamed folder to better reflect the content
[#58098934] added 'update commodity' feature and started making it pass
[#58098934] finished making 'update commodity' feature pass
[finished #68924412] added 'delete commodity' feature and made it pass
enabled 'add commodity price' feature
[#68924418] added Account#content_type
started to create CommodityTransactionCreator
working the commodity transasction creator spec