Merge pull request #44 from dongseok0/master

Clear stack of ExecutionQueue to prevent memory leakage
Allow overriding `storeName` in `options`
Merge pull request #45 from amiuhle/patch-1

Allow overriding storeName in options
Added support for compound indexes
Added option to pass index information for Model.fetch()
Also checking for model.id in model fetch with index options
Improved check for valid key
Removed logging for index options
Merge pull request #47 from amiuhle/feature/compound-indices

Compound indices
fixed issue with ordering so that .done() is not called before it's actually successful
Merge pull request #48 from NadaAldahleh/patch-1

fixed issue with ordering so that .done() is not called before it's actu...