[TASK] Added ext_icon.gif
[FEATURE] Improved Fontend error handling

Utilities for improving the error handling in the Frontend are added.
This feature includes the improved detection of 403 errors and the
redirection to the login page if a non logged in user accesses a
protected page.
[TASK] Raised version number / state

Version number is 0.1.0 now and state is changed from alpha to beta.