added new queue_invalidator
added test cases doc
added a single test case
basic _id based invalidations added
added tests
added opQueue
added tests for IdUpdateQueue
added OpQueue with cleaner algorithm
removed queue invalidator tests
re-implemented cursor tests for invalidator
re-written update_modifier_to_fields.js test
re-work on invalidator templates
make server_collection compatible with new Queue Invalidator
make cursor fully compatible with new Queue Invalidator
server_methods getting compatible with new Queue Invalidator
removed unused files
Merge branch 'queue-invalidator2'
updated mongo version
version bumped