Edit: The reason you need to do this is because they build the package for raring so we need some older packages in the raring repository to install that are not available in trusty.
The command sudo add-apt-repository "deb http://us.archive.ubuntu.com/ubuntu/ raring main"' isn't going to do anything but error out. This is not how you would add that line to your sources. You need to either edit the sources.list document with a text editor or you can use software-properties-gtk(gui method).
For the gui method run(or type in terminal) software-properties-gtk. The go to the Other Software tab click add and paste this line.
deb http://us.archive.ubuntu.com/ubuntu/ raring main
Then do an update.
or
You can edit the sources.list with a text editor
# sudo nano /etc/apt/sources.list
Copy paste the following lines to the end of the document
deb http://us.archive.ubuntu.com/ubuntu/ raring main
deb-src http://us.archive.ubuntu.com/ubuntu/ raring main
Save the document and do another update and try the install again.
The command sudo add-apt-repository "deb http://us.archive.ubuntu.com/ubuntu/ raring main"' isn't going to do anything but error out. This is not how you would add that line to your sources. You need to either edit the sources.list document with a text editor or you can use software-properties-gtk(gui method).
For the gui method run(or type in terminal) software-properties-gtk. The go to the Other Software tab click add and paste this line.
deb http://us.archive.ubuntu.com/ubuntu/ raring main
Then do an update.
or
You can edit the sources.list with a text editor
# sudo nano /etc/apt/sources.list
Copy paste the following lines to the end of the document
deb http://us.archive.ubuntu.com/ubuntu/ raring main
deb-src http://us.archive.ubuntu.com/ubuntu/ raring main
Save the document and do another update and try the install again.