Implement the basic functionality of building and installing packages.

Change log:
* base script for controlling installations including the following options:
    - specificy packages to installations
    - choose to install dependencies
    - installation directories
* script for building zsh
* script for building ncurses (zsh dependency)
* script for building tmux
* script for building vim
* option to supply python3 configuration directory
* add instructions for building and installing to README.md
* add description of project to README.md