Add: Add introduction of Ubuntu_install in README.
Add: Add headers for Ubuntu_install.sh.
Add: Add structure of var/fun definition and do.
Add: Add structure of environment.
Add: Add function to apt install array of tools.
Add: Add variabless for basic tools.
Add: Add function to install Calibre.
Add: Add variables and functions for CUDA.
Add: Add variables and functions for OpenCV.
Add: Add variables and functions for TeXlive.
Add: Add curl, ack. python-xlib for Emacs24.

Change: Add installation of ack, curl and python-xlib for Emacs24.

* curl is needed by Emacs Prelude installation
* ack is needed by Emacs Prelude
* python-xlib is needed for Emacs ibus support
Add: Add option -p for ppa installation indicator.
Mod: Use context instead of environment.
Add: Add variables and functions to install fonts.
Add: Add variables and functions for Python.
Add: Add comment for python variables.
Add: Add useful Python libraries for memo.
Mod: Formatting.
Mod: Code cleanup.
Add: Add variables for modules.