[Fortran] Add dummy header to simplify makefile

We also rename the Fortran C wrappers.
removed Windows-specific code from addVectors. sorry about that.
Merge pull request #11 from lcw/fortran

[Fortran] Add dummy header to simplify makefile
Merge pull request #12 from FlorianKummer/master

removed Windows-specific code from addVectors. sorry about that.