Add a short list of compilation tools needed to compile GnuSocialShell

Author: dalmemail

README.md

@@ -14,6 +14,9 @@ GnuSocialShell is a simple, userful, text-based GnuSocial client write in C by D
 
 
 #### Compile
+
+Before you start the compilation process please make sure you have the following tools installed on your system: gcc, autotools (autoconf & automake), gnulib.
+
       $ touch config.rpath
       $ autoreconf -iv
       $ ./configure --prefix=/usr/local