File paths: Convert native Win paths to use "/" 
On linux we need to convert filepaths produced on windows manually
before trying to find the relatively placed files referenced by the
project.
Octave interface: SocketServer Major review

Simplified and made more readable. Hopefully more stable and robust.
Octave interface: Improved Unit test
Octave Interface: Fixed wrong timestep array detection

The test to check whether an argument was a array of timestep indices
was not good enough. Text was also interpreted as a matrix.
Typechecking of the arguments is difficult due to the lack of
documentation of the octave API