Update requirements.txt - remove gridtk

Closes #49

See merge request !61

The little typo was corrected

See merge request !60

Changed the referece files for PLDA

Closes #61

See merge request !62

Merge branch '59-strange-behaviour-when-retrieving-objects-from-bob-bio-base-filelist-database-query' into 'master'

Resolve "strange behaviour when retrieving objects from bob.bio.base filelist database query"

Closes #59

See merge request !59

You can now specify a minimum file size for saved files

See merge request !58

replace the original_directory path in the low-level db too

See merge request !57

makes the annotations method implementation mandatory

See merge request !56

Add the filelist interface

Fixes #52

See merge request !54

Correctly reorganized the input for the PLDA

Closes #56 

I'll give 24h for objections before merge this one :-P

See merge request !55

Optimized PCA training

Testing PLDA with no PCA

Fixed issue #53 . The default resource is not working

Closes #53

See merge request !53

Resolve "--execute-only command line option does not work"

Closes #51

This was just a small issue, which I have solved. I also added a new test case for the `--execute-only` command line option.

See merge request !51

Added nitpicky to sphinx and fixed warnings



See merge request !50