Documentation

Add some documentation and remove unused code lines.

Using yapf-0.14.0.

Document two-phase flow input parameters.

Add link to docs.opengeosys.org documentation.

Docu move process in prj

This allows for correct documentation of the process_variables.

Automatically with sed
sed -i 's/ogs_file_param_attr{process/ogs_file_param_attr{prj__processes__process/g'
and similar to the ogs_file_param_special and the ogs_file_param
doxygen commands.

Actually move to documentation as an example.

Remove documentation pages not referenced in code.

Corrected the documentation for LiquidFlow

Documentation missing files (stubs)

Removed local curve parser

Some Windows fixes

Fixing process documentation