Updated database schema.
Now the table 'Lemmes' contains the following columns:
'Lemme', 'freqlemfilms','freqlemlivres'.
The table 'Flexions' had been stripped of the two preceding columns to allow rare flexions of lemmes to carry lemme frequency distribution.

The frequency distribution data is derived from Lexique380.

TODO:
Refactor ,clean code and add comments.
Add more functions to process the data.