[web] Publications page

Some changes in Tests

Clang format

[CL] Encapsulated into ChemicalSystem

Fix some of the CppCheck warnings.

Restrutured publications into three topics

- Paper
- Books
- Tutorials

FontAwesome CDN will not be available for us (paid feature) beginning
August 2020. Instead a local subset was created. Should be much
smaller and result into faster initial page load times.

Split shifting coordinates and creating nodes.
The implemention uses more memory but avoids a lot
of shifting operations.