No-warranty release to the public domain

Places an "Unlicense" statement in the base directory of the repository,
releasing copyright interest and dedicating all content to the public
domain.
Brief explanation and disclaimer

Adds a README explaining the purpose of the repository and a disclaimer
about the portability of the contents to non-Linux systems.
Bash configuration

Includes aliasing from .bash_profile to .bashrc, prompt handling, some
aliases, and basic environment setup.
Vim configuration

Includes Syntastic checker configuration and some basic environment
setup.