(Phase 6) Claim limit calculations

Add claim limit calculators for each Phase.

* Cfe Users can download a Claim Limit report for all Lenders.
* A summary of the remaining claim limit for each Phase is displayed on each Lender's dashboard.
* A minor makeover for the Lender dashboard.

Dashboard before:

[![Dashboard before](https://cloud.githubusercontent.com/assets/53722/2539300/c4f3e334-b5c6-11e3-9310-eb4adb2ad947.png)](http://f.cl.ly/items/1J2u301E1p3H1O3k2n2Q/dashboard-old.png)

After:

[![Dashboard after](https://cloud.githubusercontent.com/assets/53722/2539272/7e91d306-b5c6-11e3-906d-aa52e654c1d4.png)](http://f.cl.ly/items/3l262z1y2c1a3l1i3M0q/dashboard-new.png)