Remove rvmrc, add ruby-version and ruby-gemset
Update dependencies
Add failing spec for #77
Expand arrays. Fixes #77
Expand complex values in arrays.

[ close #80 ]
[ fix #77 ]
Add failing spec for #76
Expand nested values when expanding hash. Fixes #76
Update changelog
Update changelog
Add failing spec for #75
Added to_s method to Key
Expand complex values when merging criterions using __multi__ strategy. Fixes #75
Fix failing spec for #78