typo (+2 squashed commits)
Squashed commits:
[78d2df8] changed to requested syntax
[bce5c2b] Fails if the key is a non-string type
Merge pull request #7 from sstarcher/fix_int_keys

Support int keys
Merge pull request #1 from omribahumi/master

DataCollection and Rb::InstanceChooser fixes (more details inside)
README fix: yaml datasource documentation was wrong