Wrap up server component for Python Package Index

The Python Package Index (pypi) is a central repository for Python
packages. I have wrapped up the server component. This required a
setup.py file, some file moving and a MANIFEST file which files it
should include.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Change default directory for configuration files

As I start to make the server component available for self-deploy the
configuration files now move to /usr/local/etc/security-cam. Hence, I
had to change the default path for looking up both configuration files:
motion.conf and settings.cfg.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Change path for token request key and secret

The path for the token request key and secret needs to change as well.
They will now be stored in /tmp.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Make captures directory configurable

Also the captures directory needs a place of its own. Hence, I have
added another section to the settings file. The tilde can be used for
taking the user's home directory. This, however, needs post-processing
by Python, otherwise a folder with name ~ is created in the server's
directory.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>