Add blank line
Remove blank line.
Add blank line.
Add Doxyfile
Add entries to .gitignore
Fix parameter description in ctobssim.cpp
Precise file path
Add make doxygen to autotools (including doxygen discovery).

The configuration script now automatically detects doxygen and the Makefile allows creation of the Doxygen documentation using make doxygen.
Properly ignore m4 content.
Merge branch 'doxygen' into integration
Adapt.
Ignore doc/man folder.