update docs to include link to github project page

doc/alien.md

@@ -32,7 +32,29 @@ the test suite (`tests`) you can run the suite with:
 
     lua -l luarocks.require test_alien.lua
 
-Alien installs one modules, `alien`.
+Alien uses the GNU build system. For detailed instructions on
+installations that do not use LuaRocks, see INSTALL in the 
+distribution. 
+
+For a quick start, if you checked out sources from [Github](http://github.com/mascarenhas/alien) (skip this
+step if you downloaded the .zip in the Downloads section):
+
+  ./bootstrap
+
+Then run:
+
+  ./configure && make [&& make install]
+
+You may need to supply non-default paths (e.g. if you are using a
+system that supports more than one version of Lua). For example, on Debian or Ubuntu:
+
+  CPPFLAGS='-I/usr/include/lua5.1' ./configure --libdir=/usr/local/lib/lua/5.1 --datadir=/usr/local/share/lua$
+
+To run some tests:
+
+  make check
+
+Alien installs one module, `alien`.
 
 Basic Usage
 -----------