Hacks needs to be sourced without the vendor directory

[cardil]

Currently, the hack scripts are being sourced from vendor/ directory. To stop relying on hack being in vendor we need a different way to provide the scripts to the projects.

There were at least two proposals:

1. Sync the hack scripts to projects using a robot, preferably using git subtree to keep the separation. (@upodroid idea)
2. Embed Bash scripts withing some hack binary. That binary, when executed, will extract them to a temporary directory, and provide the path to the scripts, so they could be sourced. (@cardil idea)

[cardil]

We'll try the 2nd proposal.