Finally, I managed to upload code to gitlab.com:

https://gitlab.com/christoph-conrads/christoph-conrads.name

The repository contains:

• The WordPress theme of this website, a child theme of "Twenty Fourteen",
• measurement data and scripts of the article Performance and Accuracy of xPTEQR, and
• the Matlab code for the article Spectral Norm Bounds for Hermitian Matrices.

Many commits were modified on April 12; I retrofitted all files of my WordPress theme with license headers in order to avoid licensing issues.