Start to improve install and uninstall bash script
Added lightbox function for bash.

Lightbox function displays a 80 characters line, with the chosen background (only blue for the moment).
It will be used for header in install/uninstall bash file.
Bash : new lightbox colors, install/uninstall script improved. Configuration python script has now default values too.
Added comment in config.py (console outputs must contains at most 80 characters)
config.py : Fixed default value for web server port.
Some fixes (Spelling, code syntax, etc.)
Fixes: round 2!
Renamed "Web server port" option in config.py
English grammar and spelling fixes
Merge pull request #25 from miniche/develop-improve-install

Intall/Uninstall improvements