Log of /SCALE/scale/dsl.py

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Implemented parsing of SCALE declaration statements, so you 
can now experiment with creating and parsing SCALE-based
configuration formats, although semantic support (i.e.
eval/exec, scope lookup etc.) is still nonexistent.

Added subexpression trees and statement-splitting functions, to
make it easier to create simple high-level parsers.

Created a new project for SCALE - the Syntax for Configuration
And Language Extensions.  So far, this just includes a nifty
generic parser for "Python-like" languages.  One of the examples
that shows the power of the parser is a 7-line Python code 
reformatter that can reindent Python code without changing its
semantics, properly handling comments, multi-line strings,
continued lines, and much much more.  The actual SCALE mini-
language will be implemented atop the generic parser, and it
should be pretty easy to create other domain-specific languages
(like parser generators and other code generators) atop it as
well.