Added a README (README.md)

README.md

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+FFmpeg (Latest Git/Stable Static Builds) for GNU/Linux
+======================================================
+
+    Script:    clamsawd (clamsawd@openmailbox.org)
+    Builds:    John Van Sickle (john.vansickle@gmail.com)
+
+### How to install (ffmpeg-install):
+
+  * **Instructions:**
+  
+    * Open the terminal.
+    * Clone the repository: `git clone https://github.com/clamsawd/ffmpeg-install.git`
+    * Change directory: `cd ffmpeg-install`
+    * Copy the script to `$PATH` (as root): `cp -rf ffmpeg-install /usr/bin/`
+    * Change the permissions (as root): `chmod +x /usr/bin/ffmpeg-install`
+    
+_Note: The script are compatible with all GNU/Linux distributions._
+
+### How to use:
+
+  * **Commands to install:**
+
+    * `$ ffmpeg-install --install (Latest git version)`
+    * `$ ffmpeg-install --update release (Latest stable version)`
+  
+  * **Commands to update:**
+
+    * `$ ffmpeg-install --update (Latest git version)`
+    * `$ ffmpeg-install --update release (Latest stable version)`
+    
+  * **Command to uninstall:**
+  
+    * `$ ffmpeg-install --uninstall`
+  
+  * **Show help:**
+  
+    * `$ ffmpeg-install --help`
+    
+### External links:
+
+  * [FFmpeg official website](https://www.ffmpeg.org/)
+  * [FFmpeg source code](https://www.ffmpeg.org/download.html)
+  * [FFmpeg Github](https://github.com/FFmpeg/FFmpeg)
+  * [FFmpeg Static Builds](http://johnvansickle.com/ffmpeg/)
+