Namespace change: fvwm -> mvwm

Start putting MVWM under mvwm for things like modules, etc.
Move doc/ to legacy/

Will be replaced with mdoc documentation when complete.
Move bin/ to legacy/
Add .gitignore
Move po/ to legacy/
Rename x*() wrappers to mvwm_*()

Due to GNU Readline (yay, thanks GNU!  Grr) exporting xrealloc, and friends,
MvwmConsole ends up going mental with the wrong xrealloc() version.  Since
the nice folks at GNU Readline don't consider this a bug (huh?), rename
these wrappers to mvwm_* instead.
Add travis-ci YAML config file

This will allow MVWM to be built every time a commit is made to the
repository.
Fix errors in .travis.yml
Fix errors in .travis.yml
Travis CI:  Add dummy test target
Create README.md

Appease Github.
Update README.md

Correct spelling:  s/configuation/configuration/
Update TODO

+-
TODO:  Rant about string handling
Update README.md

Added travis-ci build status.
+- TODO
TODO:  +-

Removed some completed items, and added some suggestions from Dominik Vogt.