Added initial report interfaces
Report data aggregator resolution
Data aggregators
Started refactoring report resolvers to simply resolve ApiControllers
More work on report resolution
ReportApiController resolution
Initial work on adding individual reports to Merchello tree via resolution
Merge pull request #798 from rustyswayne/1.4.0

Work on reports
Added controller and package.manifest for the Merchello.Avalara plugin. Wired up binding between controller and view for Avalara tax provider's editor, with validation and population of country/province dropdowns.
Merge remote-tracking branch 'merchello/1.4.0' into 1.4.0