Added dos2unix programs to convert line endings from dos/windows to
unix.

Hopefully this fixes the issues reported by johr in issue #45 and issue #50
reported by Limpster.
Replaced dos2unix call with call to local function sanitize_inputfile().

This makes it more generic and if more processing of input files is
needed, it will only need to be done in one place.
Fixed variable assignment by removing spaces.
Cleaned up files needed/used for inputfile sanitization.

Removed unix2* programs since they won't be needed.
Replaced mac2unix with a symbolic link to dos2unix, since that's what it is
in the package as well.