Added conversion from NSString to NSNumber into imports
Added Unit test for string to number conversion
[296] Fix problem with NSStrings trying to be parsed as an object
Fixed problem with To-Many relations retrieved as a single object
MR_inContext: works on objects with temporary IDs
Update save examples in README

Fixes #381
Merge pull request #334 from angelolloqui/develop

Convert NSString to NSNumber when importing
Merge commit '435da5901d3363d99ebc5e3ad1c459a0f01c1001' into develop
Merge commit '52ddbfde1e5a59739274ecb2920ee92c74c1e282' into develop
Merge branch 'release/0.0.1'