PostgreSQL bugfix and support for amd

Add missing requirement for using PostgreSQL in SQLAlchemy and support now amd and arm for 64 bit

new database handling for connector

What

• fix issue #6
• for connection string PostgreSQL is supported

threshold update, documentation

What

• There was a wrong env variable (MBIT_THR_FROM_NETWORK_UPLOAD_TO_RUN) mapped to abort condition. Before that fix the upload threshold was used for the download abort condition
• Add first version of the documentation

Save in database

Store measurements in database. In case a database connection is not possible (wrong login data) it will be store in a SQLite. Currently only supported:

• MariaDB (mariadb+mariadbconnector://User:[email protected]:3306/database)
• SQLite

Speedtest with Fritzbox

First version for the speedtest. No database action, only speedtest and show results on console