Fit with weights
Add --correlation-size option
Print offset
Do not link threads
Fit without offset
Set t_0 to 1
Revert "Do not link threads"

This reverts commit 078c52ef6d5ba75db03d648027be8922009c3ac8.
Progess bar prints time
Seite eingespart
Use threads for calculation of correlations

Squashed commit of the following:

commit b7c3cf1da21fbf17e76fbb28baca1c937116c6ff
Author: Martin Ueding <dev@martin-ueding.de>
Date:   Thu May 22 16:03:54 2014 +0200

    Get it to work, apparently

commit 84b7e4c6fe0bc4d1996ea383bebc029c43f12140
Author: Martin Ueding <dev@martin-ueding.de>
Date:   Thu May 22 15:33:20 2014 +0200

    Do some threading stuff
Fix plotting errors
Add argument
Füge Quellenangabe ein
Add t_0 option
Astyle