add help2man build scripts to generate manpages for the facilitator
- wrapper script mkman.sh to work around help2man generating non-standard formatting in usage synopses
- keep mkman.sh in top-level, for future use by other components
  - symlinks in facilitator/ are so `make distcheck` works. this could be cleaner, but for now I thought we'd keep up the charade of facilitator/ as a self-contained autotools package
- remove -Werror from automake so we can use %-patterns
add a help2man man page for the nodejs browser proxy
add an install target to Makefile for convenience
Leave off --root if DESTDIR is not defined.

I got this error (note lack of leading slash on the installation
directory):

python setup-common.py install --root=
running install
Checking .pth file support in usr/local/lib/python2.7/dist-packages/
/usr/bin/python -E -c pass
TEST FAILED: usr/local/lib/python2.7/dist-packages/ does NOT support .pth files
error: bad install directory or PYTHONPATH
Merge branch 'help2man'