Initial TLS implementation.
Document namespace prefix config options and make sure we always
set reasonable defaults. Resolves #630.
Merge pull request #635 from mozilla-services/stat_accum_doc_fix

Document namespace prefix config options and make sure we always
Merge pull request #634 from mozilla-services/tcp-tls-support

Initial TLS implementation. r+ trink
Merge branch 'dev' into features/issue_372

Conflicts:
	CHANGES.txt