added __exit__ and __enter__ to pyejdb.EJDB to allow for use in with statements.
added MacOs installation suggestion until pip repo is not updated
added MacOs installation suggestion until pip repo is not updated
Merge branch 'master' of github.com:deddu/ejdb-python

Conflicts:
	README.md
Merge pull request #4 from deddu/master

added __exit__ and __enter__ to EJDB obj to use inside with constructs.