split incoming messages at newline characters
Merge pull request #39 from tribut/multiline-parsing

Security Fix: split incoming messages at newline characters
Add tests for build_privmsg_in.
sanitize dynamic data while constructing commands
split lines using \r\n as required by the protocol
accept any received linebreaks, not just \n

there is no guarantee that the remote encodes linebreaks inside the
encrypted message as \n. splitlines() takes care of any deviations.
Merge branch 'sanitize'

Conflicts:
	weechat_otr.py