AAAR v2.1 beta for Pentaho v5.1

AAAR v2.1 beta for Pentaho v5.1
AAAR v2.0 stable for Pentaho v5.0
Please, check because it always download v2.1 even if selected v2.0. 
Tnx.
AAAR branch

AAAR branch updated.
Merge pull request #139 from fcorti/patch-2

AAAR v2.1 beta for Pentaho v5.1