Merge pull request #32 from CamNZ/master

Issue #28 - added autoreconf information to readme

Author: bgilbert

README.md

@@ -17,6 +17,9 @@ Building on Linux or Mac OS X
 ./configure
 make
 make install
+
+(If building from the Git repository, you will first need to install
+autoconf, automake, libtool, and pkg-config and run "autoreconf -i".)
 ```
 
 Cross-compiling for Windows with MinGW-w64