Changes.md file

This is the beginnings of markdown for the CHANGES (Changelog file). All (most?) of the bugs are hyperlinked. There's some code-type cleanup needed where the changelog includes some code, and for some reason there is some bad formatting around OTRS Version 1 changelogs.

In case someone wants to run with this on the OTRS side, I thought I'd provide a (hopefully acceptable) starting block to finish up.

Please note that the intermediate commits were/are made for other things that don't apply to this pull request. I am trying to get the hang of Git and github and realized I didn't want my master to vary from OTRS/otrs, but my branches may be what I'm attempting to accomplish with my fork. Unfortunately, during my learning phase, the changes were logged into master, and when I branched to provide this pull request, the master history of course stuck. 

Note that aside from the commit history, the effective change is one file. 

If none of this makes any sense, just reject the pull request and copy the file, if you want it?