Improved README: use multiple lines for apt-get instruction

README

@@ -33,10 +33,13 @@ This is Linphone, a free (GPL) video softphone based on the SIP protocol.
 
 	Here is the command line to get these dependencies installed for Ubuntu && Debian 
 
-	$ sudo apt-get install libtool intltool libgtk2.0-dev libspeexdsp-dev libavcodec-dev libswscale-dev libx11-dev libxv-dev libgl1-mesa-dev libglew1.6-dev libv4l-dev libxml2-dev
+	$ sudo apt-get install libtool intltool libgtk2.0-dev libspeexdsp-dev \
+libavcodec-dev libswscale-dev libx11-dev libxv-dev libgl1-mesa-dev \
+libglew1.6-dev libv4l-dev libxml2-dev
 
 	+ for optional library
-	$ sudo apt-get install libreadline-dev libgsm1-dev libtheora-dev libsoup2.4-dev libsqlite3-dev libupnp4-dev
+	$ sudo apt-get install libreadline-dev libgsm1-dev libtheora-dev \
+libsoup2.4-dev libsqlite3-dev libupnp4-dev
 
 	+ Install srtp (optional) for call encryption :
 		$ git clone git://git.linphone.org/srtp.git