add spec for source and content passed to site.pf
Add path param, allow title different from version

Allow us to specify a path independent from the version in use. Also
allow an arbitrary resource title that lets us use a version string.

These two changes will allow us to stage a site.pf to arbitrary
locations, such as a directory in a user's PFPATH or to a staging
location for automated builds.
Merge branch 'feature/site.pf_path' into devel
Bump version to 0.6.0
Update docs for 0.6.0 release
Merge branch 'release/0.6.0' into devel