[Ubuntu] Install sublime test for ubuntu

Install via the Package Manager(apt-get):

Simply add to your packages:
For Sublime-Text-2:

sudo add-apt-repository ppa:webupd8team/sublime-text-2
sudo apt-get update
sudo apt-get install sublime-text

For Sublime-Text-3:

sudo add-apt-repository ppa:webupd8team/sublime-text-3
sudo apt-get update
sudo apt-get install sublime-text-installer