MB-100: Update .gitignore to include .DS_Store files

Change-Id: I6e06bcc9dbf17fcbd42feb71fc226756211c53c2
Reviewed-on: http://review.couchbase.org/27871
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Michael Wiederhold <mike@couchbase.com>
Start using CMake

Change-Id: Iad199f8bf48419846aaea3d0e46f4a15cb06f2d1
Reviewed-on: http://review.couchbase.org/26543
Reviewed-by: Michael Wiederhold <mike@couchbase.com>
Tested-by: Michael Wiederhold <mike@couchbase.com>
Enable build of platform layer

Change-Id: I0b2e1a7c530da56c769b6060cecd0aa0900c78ba