Expose EJSON object when use_ejson is true, and add a test for it.
Clean-up whitespace
Update Readme
Merge commit '5fa04d8877d1f37e3ee20b0dac9a12389b935e23' into expose-ejson

Conflicts:
	README.markdown
Merge branch 'expose-ejson'. Add ddp-random to package.json
Merge commit '198125c37962b10462e311440d46767a7c41d782'
Merge branch 'master' of https://github.com/oortcloud/node-ddp-client