Removing unnecessary var descriptor as arrays are already returned by reference
Merge pull request #209 from benharsh/revcomp

Removing unnecessary var descriptor
Functionality from #128 no longer results in an out-of-bounds error here
Merge pull request #210 from benharsh/assocImplicitAdd

Functionality from #128 no longer results in an out-of-bounds error here
Provide uniform isXxx functions in the standard modules.