Adds report module (and tests) with commands largely matching profile.
Adds initconfig command to generate a default config with some preset data. (plus tests)
removes the now uncessary pack-scan.sh script
Updates URL to current git repo url.
Updates docs to describe use of the new report command.
Merge pull request #14 from candlepin/csnyder/reports

Adds a report and initconfig module to rho.

The report command has the same set of subcommands as profile. A report is a named list of fields and an optional output file name. In addition this PR adds the initconfig command. This command generates a config file with a set of defaults. Presently this includes only the pack-scan report. Adding this command gives us the opportunity to provide these defaults, expand on them in future versions and perhaps use the command as an interactive set up for rho. 
While these changes are applicable to rho in general they also simplify the use of rho as a replacement for pack-scan.