Update install.html

added mageia to the install page
Update install.html

s/Xorg/X11/
Merge pull request #126 from blue-prawn/patch-1

install on mageia
Update install.html

just some aesthetic formating
Merge pull request #127 from blue-prawn/patch-3

Update install.html
Update the link of the 99 Problems crossword puzzle image

Fix bug #128.
Add the company "Vector Fabrics".
Added link to external tutorial
Merge pull request #132 from Leonidas-from-XIV/c-module-tutorial

Added link to external tutorial