Merge pull request #2 from Rhetos/master

Uskladivanje s Rhetosom
Merge pull request #29 from sstublic/master

Merge pull request #2 from Rhetos/master
Merge branch 'master' of https://github.com/Rhetos/Rhetos
GenericRepository Query functions. Improved error handling. Minor refactoring.
Using ValueOrError instead of exceptions in DSL parser for easier debugging and Debug-mode performace. ValueOrError was already partially implemented in the parser.
New concept: RowPermissions-AllowRead,
a helper for building the row permissions filter that allows combining multiple rules and inheriting rules from one entity to another.