GUI (Beta) implementation

Make --destination optional, improve readme

Update readme

Fix entry points, PIP release

Fix main entry point

Implement entry point 'tagsnag'

First pip release

Update project name

Clean dirty debug print statements

Fix of several breaking bugs

Implement autostash option and improve logging

Implement prune argument

Implement tag pull and improve logging

Implement multithreading for time consuming tasks.

This version improves the runtime by factor n (n being the repository
count)

Enable updating without extraction

Minor version fixing version numbers and readme

Fix release for folder extraction update

Implement folder extraction feature

Deployable prototype. Quickstart, optional XML

First working prototype. XML input.