Ignore couch_view_group_cleanup

Change-Id: If613c70016cbd097d2fe1710f9cd380aaddb08b6
Reviewed-on: http://review.couchbase.org/31541
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>
Remove obsolete autoconf files

Change-Id: I19454db9aeef616718039bedbe118496603da300
Reviewed-on: http://review.couchbase.org/31542
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>
MB-9771 Add native incremental index updater

Implementation of native external program for performing
incremental update into the index. The external program receives
necessary info such as index file location, header pos, sorted
operation list files, buffersize, etc via stdin and it efficiently
performs bulk updates to the view btrees and result stats are
sent out via stdout.

Change-Id: Ib35f741e5b615c4dd7f6c3527079538dd56373a0
MB-9771 Exchange viewgroup header via stdin/stdout

For view index incremental updater, change has been made
to receive viewgroup header via stdin and send back new header
after performing incremental updates via stdout. This avoids
writing of intermediate index header from native updater.

Change-Id: I68aecd2cb305a45a46f3d3fb45c705f2eab72ccc
MB-9771 Perform view ops sorting in incremental index updater

Change-Id: Ib7a135d68504137c27535df49f402e5ddf5102b0