Add READMEs

README

@@ -20,4 +20,5 @@ AVAILABLE BUILD TARGETS
 
 The following targets are supported:
  - Linphone for BlackBerry10 - see README.bb10
- - Liblinphone Python extension module - see README.python
+ - Liblinphone Python extension module - see README.python
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+ - Flexisip and dependencies - see README.flexisip.md
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README.flexisip.md

+********************************************************************
+** FLEXISIP DEB AND RPM FILES                                     **
+********************************************************************
+
+BUILD PREREQUISITES
+*******************
+
+The common prerequisites listed in the README file are needed.
+Note that building flexisip packages requires to be building on a Linux host.
+
+### Redhat / RPM-based
+
+    sudo yum install @development-tools speex-devel \
+        hiredis-devel libtool-ltdl-devel libiodbc-devel \
+        boost boost-system boost-devel
+    make build-flexisip-rpm
+
+
+### Debian
+
+To be able to build Flexisip debs on a Debian machine, you will have to install all of these (plus the usual compilation tools) :
+
+    sudo aptitude install cmake rpm libmysqlclient-dev libmysql++-dev libmysqld-dev libssl-dev bison doxygen
+    sudo aptitude install alien fakeroot libhiredis-dev
+    make build-flexisip
+ 
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