Needed librairies

They should never be in the git history. If we want to modify a .jar,
we remove first from history and then add it again.
See:
https://help.github.com/articles/remove-sensitive-data
Read me added
.gitignore added
The demand at the origin nodes can now be specified
BUGFIX: The uniform distribution of the external split ratios was wrong
Refactoring: The junction solving is now in the junction class
BugFix: The update of the in-flows for 1x1 was not always working
Comments added
toString() added for some the origin split ratios
We can now load non compliant split-ratios from file
Doxygen configuration file
We can now have several origins and split ratios are initialized properly
Initialization of the split ratios on the buffer among the CC
BUGFIX: The injection of the density in the buffers was not correct
Debug option is now available
We can now load internal non-compliant split ratios
Ipopt is not yet necessary but here are the details when it will be
A file needed to launch the java program was missing
Referencing code that is not is the shared repository
Removing not executed code with compilation errors