Adding test suite for force.entity - for now has just one dummy test
Added support for select count(*) from {soup} in MockSmartStore
Tests for StoreCache init, save, retrieve, addLocalFields -- not done yet: remove, find
Merge branch 'unstable20' of github.com:forcedotcom/SalesforceMobileSDK-Shared into unstable20
Easier to understand merge modes
Merge pull request #90 from wmathurin/unstable20

First tests + Easier to understand merge modes