Added info-re as supported by https://github.com/illusori/emacs-flymake
Merge pull request #1 from thomasf/master

Added info-re as supported by https://github.com/illusori/emacs-flymake
Only set info regexp when available, and note compatibility in docs
Assume there is only info level regexps with one variable name.
Merge pull request #2 from thomasf/master

Assume there is only info level regexps with one variable name.