adding epengine.xml copy of over branch-master.xml

for ep-engine team's projects

Change-Id: Iadc523df4d9b16640001c406f6dae24347a5748d
Reviewed-on: http://review.couchbase.org/29011
Reviewed-by: Sundararaman Sridharan <sundar.sridharan@gmail.com>
Tested-by: Sundararaman Sridharan <sundar.sridharan@gmail.com>