Release version 1.3.0.
Add changelog for version 1.3.0.
Fix SMP command with nick, server and secret only.

Add tests.

Fixes #54
Document that SMP questions and secrets can be quoted.

Add test for SMP quoted with multiple words.

Fixes #55
Make Assembler a new-style class.
Use args in setup_smp_context().
introduce build_privmsgs_in to allow for a prefix

build_privmsg_in will now strip newlines from the msg argument

fixes mmb/weechat-otr#57
add tests for build_privmsgs_in
Merge pull request #58 from tribut/multiline-privmsgs

Multiline privmsgs
Break up long lines.