Fisx

Deal with incorrect line endings in data files

Include use case example as part of the test suite

Add testing information to README.rst

Implement Travis and AppVeyor testing in repository

Allow building without a cython installation

Tests comparing against PyMca only taken into account if PyMca5 installed

Correct error preventing compilation with Visual Studio 2015

Tests passing under Python 3.5

Workaround issue calculating secondary excitation due to scattering of the incident beam when the incident beam is normal to the sample surface.

Add a new Elements constructor.

Give correct weight to elastic scattering contribution.