Add --python-disable-dependency option to disable specific python dependencies.
Add --python-disable-dependency option to disable specific python
dependencies.

This is useful for example in the case of a dependency on the python
PyYAML package.

By default, this dependency gets translated to a debian package
dependency on python-pyyaml. That package does not exist on Debian
systems, so a way to override the dependency is needed.

A similar option exists already for gems (--gem-disable-dependency).

vi4m/fpm,joseph-onsip/fpm,schatt/fpm,tjyang/fpm,cturra/fpm,pskrz/fpm,gearmover/fpm,doghrim/fpm,gearmover/fpm,cturra/fpm,paul-krohn/fpm,elvido/fpm,schatt/fpm,jerizm/fpm,dischord01/fpm,hlawrenz/fpm,snailwalker/fpm,jerizm/fpm,tjyang/fpm,linearregression/fpm,josephfrazier/fpm,snailwalker/fpm,snailwalker/fpm,rbramwell/fpm,hlawrenz/fpm,mildred/fpm,wyaeld/fpm,mzaccari/fpm,pskrz/fpm,mzaccari/fpm,mildred/fpm,pskrz/fpm,dischord01/fpm,jerizm/fpm,vi4m/fpm,doghrim/fpm,mzaccari/fpm,elvido/fpm,rbramwell/fpm,josephfrazier/fpm,doghrim/fpm,joseph-onsip/fpm,linearregression/fpm,godp1301/fpm,paul-krohn/fpm,joseph-onsip/fpm,paul-krohn/fpm,tjyang/fpm,mzaccari/fpm,hlawrenz/fpm,cturra/fpm,joseph-onsip/fpm,rbramwell/fpm,godp1301/fpm,josephfrazier/fpm,josephfrazier/fpm,gearmover/fpm,mildred/fpm,wyaeld/fpm,dischord01/fpm,wyaeld/fpm,schatt/fpm,wyaeld/fpm,tjyang/fpm,godp1301/fpm,pskrz/fpm,linearregression/fpm,jerizm/fpm,gearmover/fpm,elvido/fpm,hlawrenz/fpm,linearregression/fpm,dischord01/fpm,cturra/fpm,rbramwell/fpm,snailwalker/fpm,mildred/fpm,godp1301/fpm,vi4m/fpm,doghrim/fpm,schatt/fpm,paul-krohn/fpm,vi4m/fpm,elvido/fpm