Fix for Issue 105 - ForEach not setting key values

Merge pull request #78 from b-tarczynski/index-iterator

Optimise index queries with `eq` and `in` operators

Handle custom index names properly

Move to V4

Fixed prefix issue

Merge pull request #69 from b-tarczynski/handle-errors

Handle errors

Merge pull request #29 from Wolveix/master

Cleanup README + Fix s.Find Example