set ES_MIN_MEM and ES_MAX_MEM to 50% of physical; set bootstrap.mlockall = true
Update README for memory config changes.
Merge pull request #4 from AditiTechnologies/memory-opt

set ES_MIN_MEM and ES_MAX_MEM to 50% of physical; set bootstrap.mlockall
Merge branch 'master' into es-repository

* master:
  Update README for memory config changes.
  set ES_MIN_MEM and ES_MAX_MEM to 50% of physical; set bootstrap.mlockall = true

Conflicts:
	README.md