Issue #273: Added X-Forwarded-* headers
Merge branch 'master' of https://github.com/jembi/openhim-core-js into x-forwarded-for

Conflicts:
	test/unit/messageStoreTest.coffee
PR #274: Moved proxy header code into a new middleware comp
Merge pull request #274 from jembi/x-forwarded-for

X forwarded for