Update README.md
App icons ready
Initial project commit
80 and 80@2x icons added
Add in models
Fix models to store immutable copies of arrays
Fix git structure and all references to FM
Add base object model

This commit also contains fixes from the pull request such as using
strong instead of copy for properties and adding a nil JSON test.
Fix properties to use copy in the correct way
Add api request to fetch data
Fix api request client http stubs

OHHTTPStubs is not working as expected with AFNetworking 2.  I think
this is due to the use of the Session classes for networking now.
However, I'll leave in the tests since they still work by reaceiving
data from the api.
Abstract Session Manager to its own class