Documentation: Replace ffmpeg with avconv

[jeff1evesque]

A simple installation of ffmpeg is no longer possible. Therefore, we need to adjust the Installation subsection to reflect the changes needed.

[jeff1evesque]

We have installed avconv, which will replace ffmpeg. Therefor,e we will need to change the documentation respectively from:

sudo apt-get update
sudo apt-get install inotify-tools
sudo apt-get install ffmpeg
sudo apt-get install firefox
sudo apt-get install flashplugin-installer
sudo apt-get install git-core
sudo apt-get install lamp-server^ phpmyadmin

to the following:

sudo apt-get update
sudo apt-get install inotify-tools
sudo apt-get install libav-tools
sudo apt-get install firefox
sudo apt-get install flashplugin-installer
sudo apt-get install git-core
sudo apt-get install lamp-server^ phpmyadmin

[jeff1evesque]

Our previous modification to the Installation subsection has resolved this overall issue.

[jeff1evesque]

The Linux Packages subsection still refers to ffmpeg, and needs to be removed:

Linux Packages

The following packages need to be installed through terminal in Ubuntu:

# General Packages:
sudo apt-get update
sudo apt-get install inotify-tools
sudo apt-get install ffmpeg
sudo apt-get install firefox
sudo apt-get install flashplugin-installer
sudo apt-get install git-core
sudo apt-get install lamp-server^ phpmyadmin

# Sphinx Packages: allow `./autogen.sh`, `sudo make install` for submodules
sudo apt-get install autoconf
sudo apt-get install libtool
sudo apt-get install bison
sudo apt-get install swig
sudo apt-get install python-dev