Pull request #18 by Alex Kolonitsky

* Andrus: adding new plugins to Eclipse ignores
CAY-1826 | Merge Entity Attributes and Relationships tabs together with one toolbar.

    * Pull request 19 by Savva Kolbechev
    * (Andrus) tweaking some labels for consistency
missing license headers
CAY-1961 | Fix RemoveAction for DataMaps in ProjectTree

* pull request 20 by Savva Kolbechev
CAY-1960 ExpressionFactory.exp(..) , and(..), or(..)
CAY-1960 ExpressionFactory.exp(..) , and(..), or(..)

* tweaking the API
* removing ambiguities
* optimizing binding within ExpressionFactory (no wasteful clone)
CAY-1960 ExpressionFactory.exp(..) , and(..), or(..)

* handling IN values
CAY-1960 ExpressionFactory.exp(..) , and(..), or(..)
CAY-1961 Fix RemoveAction for DataMaps in ProjectTree
CAY-1826 Merge Entity Attributes and Relationships tabs together with one toolbar.