Add base idea for index resolvers and managers
Merge branch 'indexstrategy' of https://github.com/comsysto/jumbodb into indexstrategy

* 'indexstrategy' of https://github.com/comsysto/jumbodb:
  import changes
  provide index strategies in import
  description
Merge branch 'indexstrategy' of https://github.com/comsysto/jumbodb into indexstrategy

* 'indexstrategy' of https://github.com/comsysto/jumbodb:
  some changes
Merge branch 'indexstrategy' of https://github.com/comsysto/jumbodb into indexstrategy

* 'indexstrategy' of https://github.com/comsysto/jumbodb:
  index file executor removed
  index strategies
  some import bugfixes
Merge branch 'indexstrategy' of https://github.com/comsysto/jumbodb into indexstrategy

* 'indexstrategy' of https://github.com/comsysto/jumbodb:
  more information for strategies
Merge branch 'indexstrategy' of https://github.com/comsysto/jumbodb into indexstrategy

* 'indexstrategy' of https://github.com/comsysto/jumbodb:
  better strukturing for meta data
Add index key and use in index strategy manager