Update README to add tunnel build instructions.

README

@@ -18,6 +18,8 @@ This is Linphone, a free (GPL) video softphone based on the SIP protocol.
 
 with their corresponding -dev or -devel package if you don't use source packages.
 
+Note that you need to build and install the tunnel library PRIOR to build linphone.
+
 For windows compilation see README.mingw.
 For macOS X, see README.macos
 

README.macos

@@ -31,6 +31,15 @@ When this version will be integrated into macports, only this will be necessary:
  $ port install ige-mac-integration
  $ port install hicolor-icon-theme
 
+- Compile and install the tunnel
+
+If you got the source code from git, run ./autogen.sh first
+
+Then or otherwise, do:
+
+ $ ./configure --prefix=/opt/local && make && sudo make install
+
+
 - Compile linphone
 
 If you got the source code from git, run ./autogen.sh first.

README.mingw

@@ -73,6 +73,8 @@ WARNING: During the build, windows might slow down suddenly. Using ctl+alt+del t
  you might see a process 'LVpSRV.exe' or something like this that eats 90% of cpu.
 Kill it. Don't know what it is, but once killed, windows runs normally.
 
+#Compile and install tunnel
+cd tunnel && ./autogen.sh && ./configure --prefix=/opt/linphone && make && make install
 #run autogen.sh after a git checkout or update
 ./autogen.sh
 ./configure --prefix=/opt/linphone --enable-shared --disable-static