feature-selection: Remove some large files.

These are handy only when reviewing some historical tests of the
algorithm development.
Merge pull request #108 from linas/cleanup

feature-selection: Remove some large files.
Fix discriminating_bscore::best_possible_bscore()

I'm sure the fix is correct for prerec_bscore (I tested it, though no
utest, sorry, no time).

I believe it is correct for recall_bscore but I didn't test it.

I am almost sure it is not correct for bep_bscore and f_one_bscore.
Add todo item about discriminating_bscore::best_possible_bscore()
Merge pull request #109 from ngeiswei/fix_discriminating_best_possible_bscore

Fix discriminating best possible bscore
an rdf-mapper for freebase data
Add error when no combo file found in eval-table
Merge pull request #110 from keyvan-m-sadeghi/master

wrote an rdf-mapper for freebase data