optimize map/reduce
reduce is now part of scripting
Merge branch 'master' into map-reduce-more

Conflicts:
	src/test/java/com/foursquare/fongo/impl/ExpressionParserTest.java
Merge branch 'master' into map-reduce-more
use rhino from scratch
add inline mode for map reduce
resolve conflicts
Merge pull request #87 from twillouer/map-reduce-more

Map reduce more faster