The CLI client was quite heavy in loading in a lot of libraries and
modules during runtime, which slowed it down quite a bit, especially on
slower systems.
This commit makes several major changes to help improve the situation.
1. Don't use pkg_resources to get our version, just hardcode it.
2. Reimplement our entire API call to use a custom http.client-based
system that prevents importing any unnecessary libraries (with a
custom User-Agent too).
3. Implement a lazy-loading method for some of the heavier modules, so
that they are only loaded if absolutely necessary.
Moves all tasks run by the Celery worker into a discrete package/module
for easier installation. Also adjusts several parameters throughout to
accomplish this.
Make sure all of these move to the root of the repository first, then
return to where they were afterwards, using pushd/popd. This allows them
to be executed from anywhere in the repo.
Also fixes up the Debian packaging such that this works how I would
want, with proper module installation while leaving everything else
untouched. Finally implements automatic installation and removal of the
BASH completion for the PVC command.
Add nicer easy-to-find (yay ASCII art) banners for the startup printouts
of both the node and API daemons. Also adds the safe loader to pvcnoded
to prevent hassle messages and a version string in the API daemon file.
