etc/overview.xml: fixed -[mM]ain for -Functional

3.6.1	made mops' null-handling defaults compatible with oops3's.
	oops3/Main: added -Main and -Generate for -Functional
	oops3/MopsGen: changed main() to initialize storing null for empty input
	oops3/Gen.properties m-main0
	makefile: changed functional examples to handle null properly
	
3.6.0	added mops and scanner packages to support LL(n)
	makefile, javadoc.arg, etc/*
	  changed documentation to include LL(n), produced with XSLT
	oops3/Gen: tree factory can be named
	oops3/Gen.properties: tree factory name, functional parser
	oops3/Lookahead: default lookahead for rule is empty bitset, not null
	  avoid NullPointerException when traversing a group
	oops3/Main: support functional parser, allow name for tree factory
	  don't input null tree
	oops3/MopsGen: new, code functional parser
	oops3/Visitor.properties: generated by makefile
	gl: connected makefile
	lambda: connected makefile

3.5.1	changed *.properties to avoid using getSystemResourceAsStream
	(because that does not work in an applet)
        and make parserResource an absolute path
	added output stream parameter to oops3.Utils.testScanner
	(because it needs to be redirected in an applet)

3.5.0   changed <class> to <class [:interface ,...]>
        added <> to make objects left-associative
        changed generated tree classes to be (inefficiently) mutable
        added 'guarded commands' as example (left-associative, visitor)
        
3.4.x	oops3/Recognize: noBody is not needed

3.4.0	changed terminology: observer->builder
	rename commands in Main: output->write [jJ]lex->[sS]canner
	added Observe.java, example, and documentation
	moved oops.png to proper doc-files
	fixed some typos in description, link to oops.net

3.3.0	hand-crafted Visitor
	-build/-recognize accept scanner
	visitor interface
	scanner test driver

3.2.0	LL(1) checking
	-Print grammar from tree

3.1.3	XBNF with list syntax

3.1.2	XBNF
	EBNF
	-generate shorthand for Main

3.1.1	use variable argument lists
	add position to Lookahead error messages
	eliminate < > for nesting
	change delimeted list syntax to +/ and */

3.1.0	associate input position with nodes

3.0.2	-[mM]ain resource class to select the observer class