installation / documentation improvements

[pameyer]

related: #12 #11 #5

Generic improvements for staging / production deployment, and installation / configuration documentation. Currently thinking goal for installation procedure should be "install RPM" (possibly including dependency RPMs); edit configuration file(s); start services.

• RPMs for dependencies (redis, etc), preferably in repos but build if necessary.
• python (pip) for dependencies (redis, rq, etc). preferably in repos but build if necessary (investigation of setuptools -> rpm suggests that approach is more trouble than it's worth).
• Configuration files for dependencies
• Configuration files for DCM (generator, scanner); follow convention for locations (aka - /etc/dcm rather than /root/.bashrc and DCM repository clone)
• init and unit files for DCM (cent7, cent6)
• RPM for DCM
• pipeline for testing user-facing install procedure (use template/example config files); script generation, file transfer procedure, call scanner outside cron job.
• Documentation for staging / production dependencies, installation and configuration.

[pameyer]

cent6 dependencies (that may not be in repos):

• python-virtualenv : in cent6 repos
• redis : in cent6 repos
• rq : not in cent6 repos (currently installed through pip); setuptools -> RPM looks workable from
• importlib : might need the setuptools -> RPM treatment too
• python-redis : in repos; but version potentially too old.

[pameyer]

99ede80 for the latest