Reorder feature categories

[rebmizrahi]

Reorder feature categories in picture to : OVERALL PITCH STATISTIC FEATURES
MELODIC INTERVAL FEATURES
CHORD AND VERTICAL INTERVAL FEATURES
TEXTURE FEATURES
RHYTHM FEATURES (EXCLUDING TEMPO)
RHYTHM FEATURES (INCORPORATING TEMPO)
INSTRUMENTATION FEATURES
DYNAMICS FEATURES
This should be able to be done with a custom django template filter (to be put in template_helpers.py) but there is not that much documentation on sorting filters.