Experimental changes for Stratopan.
Need to weaken reference to prevent circular dependency.
Fix typo.
Pod edits.
Bring back the log dir.

Pinto still doesn't have logs, but this
can be used for pintod to write server access and error logs.
The auth backend is called Passwd, not Password.
Revise documentation about using cpanm to install.
POD edit.
Switch to IO::Prompt for better prompting when piping input from STDIN.
Update change log.
Bump VERSION, regen README.
Merge branch 'topic/stratopan'

Conflicts:
	lib/Pinto/Manual/Tutorial.pod
Make Preerquisite objects printable.
Optimize query for fetching all packages/distributions.