libtracker-miner: Make TrackerMinerFS use TrackerIndexingTree
libtracker-miner: Make TrackerMinerFS use TrackerIndexingTree

No more check-* or monitor-directory signals are emitted. Instead,
the TrackerIndexingTree is used to determine whether files should
be indexed.

outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker