Add targets to create .deb package

To make local testing easier.
Fix missing configuration flags

missing line continuation…
Remove further gfortran + lib32z1 from Depends
Fix .gitignore of .swp files
Upgrade Standards-Version to 3.9.5

I have no clue what this field expresses, but using 3.9.4 gives a warning.
Restrict to Architecture: amd64

Using only 64bit for Travis anyway, and there is a build error for the 32bit
version on launchpad (something to do with lib32z1 dependency?).
Finish package renaming to libmadx-dev

The half-baked renaming attempt did not produce the desired results (package
name was still madx). This is an attempt to remedy for the shortcomings of the
original approach by consistently renaming all: source package, binary package
as well as the build folder and .orig.tar.gz file.