MB-100: added more documentation for babysitting VM feature

Change-Id: Iba1acae37128eb059f7733beba73057b493e476c
Reviewed-on: http://review.couchbase.org/26509
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
MB-8239  Fixed cbcollect_info for OSX.

Setting COUCHBASE_TOP env variable here so that erl shell
script can find erlang install path.

Change-Id: Id666f0658351b7767993a5cad66c10eee12cd6b4
Reviewed-on: http://review.couchbase.org/26511
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Merge remote-tracking branch 'origin/2.0.2'

* origin/2.0.2:
  MB-8239  Fixed cbcollect_info for OSX.
  MB-100: added more documentation for babysitting VM feature

trivial merge

Change-Id: I9d515750e3333290a6a754f680a3d3c6e8261ae3