Fixed a typo in remediation, "comleted" should be "completed"

I have fixed this in master and not in the maintenance branch to avoid
breaking code that may be relying on this broken behavior. As did our
tests.
Remove my outdated networking information.

I am unable to keep it up to date.
Refactor: Move openscap.i to src/ sub-dir.
Refactor: Move python2 bindings to a separate subdirectory.
Refactor: Move pel bindings to a separate subdirectory.
Always include swig directory.

It should be intelligent enough to do the right thing.
python3: Introduce new option and probe python3 existence

./configure --enable-python3=yes
Start building python3 bindings.