Adds proper session closing and engine disposal in flask_app.
Adds sme missing statements in counter for deprecated methods.
Now only counts active hashtags in webpage.
Also removes connection to tweeter streaming API during client development
Upgrades statistics pages to give number of tweets in database and members.

Corrects datamodel to name all tables in a singular form.
All tables have to be removed and recreated from scratch to work properly now.
Comments unused library