[videoinfoscanner] scan the entire subtree of path passed to scanner.

- fixes new files not getting picked up when more than 1 level down.
- fixes hashing never being used when scanning a single directory.
[videodatabase] path hash is not invalidated when removing movie from library
[videodatabase] path hash is not invalidated when removing musicvideo from library
[musicinfoscanner] keep track of already processed paths while scanning
[videodatabase] speed up the video database cleanup for archives
FIX: [depends] install pvr at the proper, name depdendant, place
Merge pull request #5601 from mkortstiege/cleandb_archives

[videodatabase] speed up the video database cleanup for archives
Merge pull request #5594 from mkortstiege/avoid_music_dupe_scan

[musicinfoscanner] keep track of already processed paths while scanning
Merge pull request #5587 from mkortstiege/invalidate

Invalidate path hash on remove so the infoscanner can pick it up again
Merge pull request #5343 from tamland/local-scan-fix

Video info scanner fix: scan the entire subtree of path passed to scanner.
Merge pull request #5618 from koying/fixdroidpvrpackaging

FIX: [depends] install pvr at the proper, name depdendant, place