Adding utility function to get the timeseries types
Changing the GUI for event based data: from BooleanField to SelectField
Removing maginc number of the create_study.html template
Store the timeeries type passed by the user in the database and finishing up form pre-population
Adding pmids setter
Using transaction blocks for the setters
Rename all the study creation/create-like things to study edition/editor and modify the page so it allows edition of the study, not only creation