- Fixed install/readme files.

README

@@ -1,14 +1,16 @@
 This is a development version of Scyther.
 
 Read NEWS to see whats new in this release.
-
 For copyright information see COPYING
 
 For more information and extensive documentation go to:
   http://www.win.tue.nl/~ccremers/scyther/
 
+Scyther requires the argtable2 library, which can be downloaded from
+  http://argtable.sourceforge.net/doc/argtable2.html
 
 Compile and Install:
+--------------------
 
   $ ./configure
   $ make
@@ -16,6 +18,11 @@ Compile and Install:
   # make install
 
 Configuration options:
+----------------------
 
-  Use ./configure --help to see the full list of options
+If you have the argtable2 library installed in some non-standard
+directory, you can use:
+  $ ./configure LDFLAGS=-L/specialdir/lib CPPFLAGS=-I/specialdir/include
+
+Use ./configure --help to see the full list of options