added DataMarketAccessTest and ported features from the initial implementation
Merge pull request #5 from mleich/master

DataMarketAccessTest, Fixed Implementation
added OKKAM index access operator and test
fixed hadoop version
Merge pull request #6 from mleich/master

added OKKAM access operator
fixme: handle garbage entities
Merge pull request #7 from hendrikheller/master

fixme: handle garbage entities