Better experiment: uses class.
FIX test to match updates.
Factorized experiment code.
Moves loaders to db files.
Remove unused imports from db/__init__.py.
Includes code for object database (and fixes minor issues in it).

Conflicts:
	lib/array_utils.py
Update and fix object db to have working ICDL-like experiment.
Automatic coefficients in experiments.
Adds mechanism for serialization of experiments.
Adds launcher for multimodal experiments based on joblib.

Currently only includes experiments on 2 modalities.
Quick and dirty addition of three modalities experiment.
Adds logging of start and end time and dictionary.
Adds option to not load np data in logger (quicker and smaller load).
Adds label shuffling in experiment and cross-validation mode (run_mode).
Adds experiments and switch to several runs instead of cross-validation.
FIX missing shuffling in associate_labels.
Removes duplicate 'views' in image dataset json storage.
Minor, change private method name (typo).
Basic plots.
Improved and extended plots.

- Adds plot for image features.
- Groups plots with varying k for 2 and 3 modalities experiments.
- Includes and adapts code from prettyplot.