Move pkginfo dict to Input per timsutton suggest

Per suggestion and issue by timsutton (on 2014-07-29): Move all Munki
pkginfo dicts from MunkiImporter processor to Input section.
Move pkginfo pkg_path and version keys back

Moved the pkg_path and version keys back from pkginfo in Input back to
pkginfo in MunkiImporter processor, since their values are determined
programmatically at runtime.
Clean up Input section

Some cleanup of %var% names to improve legibility and clarity (since
move from MunkiImporter processor to Input section).
Merge branch 'fix_munki_pkgsinfo'