A document describing invariants in the system.
A document describing invariants in the system.

rules of index partitioning is updated.
Invariants for index topology.

Change-Id: Ife53bdad49628a6ea148a0801d7780db6971848f
Reviewed-on: http://review.couchbase.org/34850
Reviewed-by: Deepkaran Salooja <94315e58ef7caa1d9829288fe30465d5fa6ccd83@gmail.com>
Reviewed-by: Pratap Chakravarthy <3f7aa3c5f732447448ccfcd013fd9591a9825870@couchbase.com>
Tested-by: Pratap Chakravarthy <3f7aa3c5f732447448ccfcd013fd9591a9825870@couchbase.com>

jchris/indexing,jchris/indexing,jchris/indexing,t3rm1n4l/indexing,jchris/indexing,t3rm1n4l/indexing