Include TUF scripts in this repo.

Originally they were in the bitmask_client repo.
Add REUSE_BINARIES capability.

Using this new feature we can reduce the bundling time significatively
since we don't need to spend much time compiling stuff that shouldn't change.

Move dependencies to the requirements file.

Use helper variable to shorten the bundler command call.
Use json file to define versions to be bundled.

Also improve logging support to print each component's name.
Update readme information
Install manually troublesome deps.
Add checks for mandatory files.

Also factor out bundler arguments.
Add code to specify tuf stable/unstable.
Merge branch 'ivan/feature/get-tuf-into-bundler' into develop