Added a lot of documentation
Added a lot of documentation

Change-Id: Ice582364f27414883af638f1c6a78bb9f1a7d20c
Reviewed-on: http://review.couchbase.org/11458
Reviewed-by: Sergey Avseyev <87f6d5e4fd3644c3c20800cde7fd3ad1569370b3@gmail.com>
Reviewed-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>
Tested-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>

mnunberg/libcouchbase,mody/libcouchbase,maxim-ky/libcouchbase,senthilkumaranb/libcouchbase,kojiromike/libcouchbase,trondn/libcouchbase,couchbase/libcouchbase,couchbase/libcouchbase,senthilkumaranb/libcouchbase,mnunberg/libcouchbase,uvenum/libcouchbase,signmotion/libcouchbase,couchbase/libcouchbase,mnunberg/libcouchbase,avsej/libcouchbase,PureSwift/libcouchbase,couchbase/libcouchbase,avsej/libcouchbase,maxim-ky/libcouchbase,trondn/libcouchbase,couchbase/libcouchbase,avsej/libcouchbase,signmotion/libcouchbase,mody/libcouchbase,trondn/libcouchbase,signmotion/libcouchbase,mnunberg/libcouchbase,uvenum/libcouchbase,avsej/libcouchbase,avsej/libcouchbase,maxim-ky/libcouchbase,avsej/libcouchbase,mody/libcouchbase,trondn/libcouchbase,mnunberg/libcouchbase,couchbase/libcouchbase,couchbase/libcouchbase,senthilkumaranb/libcouchbase,kojiromike/libcouchbase,uvenum/libcouchbase,trondn/libcouchbase,avsej/libcouchbase,mody/libcouchbase,PureSwift/libcouchbase,senthilkumaranb/libcouchbase,kojiromike/libcouchbase,uvenum/libcouchbase,maxim-ky/libcouchbase,PureSwift/libcouchbase,uvenum/libcouchbase,PureSwift/libcouchbase,kojiromike/libcouchbase,signmotion/libcouchbase