Finalized models.
Finalized models.

Portfolio is now a foreign key in AssetClass so that a percentage can be
set for each Assetclass.

Clean up the code.
 
choozm/mamakstallinvestor-invest,choozm/mamakstallinvestor-stockquote,choozm/mamakstallinvestor-invest,choozm/mamakstallinvestor-stockquote