* Monotone.php (IDF_Scm_Monotone_Stdio): add support for multiple, equally named options
* Source.php, commit.html: split-off the global commit template (which had some separate code already for SVN) and adapt the left blocks for mtn to shorten branch and tag names just like we do everywhere else
* _getCerts(): implement a cert cache and make multiple cert values easily available
* getCommit(), getCommitLarge(), getFile(), getPathInfo(), testHash(): implement
* getTags(): save the first found revision id for a tag as key in the associative array to make tags actually browsable