chore(provision.sh): Remove trailing whitespace
feat(provision): Install GNUnet indent for code formatting

Code formatting can now be done using the pre-commit script the following way:

    ./pre-commit <folder to check all .c and .h files>

This will recurse into any subfolder as well.

Closes #19
Merge pull request #21 from vsaw/feat/19-gnunet-indent

Feat/19 gnunet indent