the installer must allow specify install location and/or shebang

[wilas]

Requirements:

• the Installer (Makefile) must allow specify install location.
• the Installer (Makefile) must auto-generate vbkick and convert_2_scancode.py on-site with the proper shebang.
• User specify the shebang and/or install location or the default value will be use.

Example use case:

$: PY_SHEBANG=`which python` BASH_SHEBANG=`which bash` PREFIX="/usr/local/bin" make install

$: PY_SHEBANG="/usr/bin/env python" BASH_SHEBANG="/usr/bin/env bash" PREFIX="/usr/local/bin" make install

$: BASH_SHEBANG="/usr/local/bin/bash" make install

$: make install # default values are used

[wilas]

This was resolved.