* Added readme

fcl/passrc/readme.txt

@@ -0,0 +1,30 @@
+Pascal Source File Processing Units
+===================================
+
+(c) 2000-2003 Areca Systems GmbH / Sebastian Guenther, sg@freepascal.org
+
+This directory contains some useful units for dealing with Pascal source
+files: Parsing, creating structures in memory, and output to files.
+
+
+pastree.pp
+----------
+Pascal parse tree classes, for storing a complete Pascal module in memory.
+Currently, mainly declarations are supported; support for implementation
+code is very basic.
+
+
+paswrite.pp
+-----------
+A class and helper functions for creating Pascal source files from parse trees
+
+
+pscanner.pp
+-----------
+Lexical scanner class for Pascal sources
+
+
+pparser.pp
+----------
+Parser for Pascal source files. Reads files via the pscanner unit and stores
+all parsed data in a parse tree, as implemented in the pastree unit.