Add project specific gitconfig and more

This introduces primarily project specific config that includes new scripts and hook.

Hook checks if commit we push to Gitlab server are correct. There are multiple checks:

• Check naming convention
• Check base (master vs develop)
• Protect against forgotten develop push when pushing master

In terms of aliases this adds:

git new-mr:
This opens web browser with new merge request on https://gitlab.nic.cz for current branch.

git new-banch:
This creates new branch interactively and should help users with naming convention.