Follow-up to "Add a method to retrieve all the samples of a dataset"

Closes #149 (closed)

The all_samples methods now correctly handles the 'train' group, returning only the samples of a group if that group is given as parameter.

The 'groups' parameters contents are now verified with bob.db.base.check_parameters_for_validity.

Groups of 'legacy database interfaces' different from 'train', 'dev', or 'eval' are now handled correctly.

changed milestone to %Bob 9.0.0

added 14 commits

• 8e838f64...9b372043 - 11 commits from branch master
• a2499e03 - Add groups() to the dummy legacy database
• 193cf6fc - Handle 'train' group in database.all_samples()
• d67c8d56 - Edit the annotate commands with correct defaults.

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added 1 commit

• 6678bcbe - Keep low level group name away from the high level

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resolved all threads

merged

mentioned in commit 50dd848a