[Tracker] Miners moved to src/miners

[Carlos Garnacho <carlos lanedo com>]

Hej all,

Now both FS and RSS miners are in src/miners, any further miner
implementation should end up there as well, eventually. 

Now, a word of warning, although git annotate should work on these files
as usual, git log will be truncated now to my commit doing the files
shuffling, so you need to pass --follow to git log for git to track file
moves as well.

Cheers,
  Carlos