quick hack
Merge branch 'devel' of ssh://github.com/triAGENS/ArangoDB into aql-feature-lazy-index
working except for 1 test.
getting tests to work
changed to number of blocks pulled by default by CalculationBlock and ExecutionBlock
Merge branch 'devel' of ssh://github.com/triAGENS/ArangoDB into aql-feature-lazy-index

Conflicts:
	arangod/Aql/ExecutionNode.h
some more cleaning up of replace-OR-with-IN
bug fix
another test for replace-or-with-in
replace-redundant-OR optimizer rule first version.
correct logic.
more flexible remove-redundant-OR rule
tests and bugfixes.
cleaning up.
adding comment
added test to Makefile, fixed jslint warning
use emplace_back
do not allocate too much space for hash index elements
whitespace
use Ast::ReverseOperator