fix spelling:   automata-test.cc
	fix spelling:   automata.cc
	add functions:   automata.cc
 	add functions:   automata.hh
	fix logic error:   automata.cc
	fix tests:   Makefile
	fix tests:   udtest-automata.cc
	fix tests:   udtest-tail.cc
 	parse automaton from xml:   automata.cc
 	parse automaton from xml:   automata.hh
 	parse automaton from xml:   udtest-automata.cc
	fix spelling errors:   automata-test.cc
	fix spelling errors:   automata.cc
	fix spelling errors:   automata.hh
	fix spelling errors:   udtest-automata.cc
	modified:   Makefile
	write to xml file:   automata-test.cc
	write to xml file:   automata.cc
	read from xml file:   automata.cc
	use alphabet set:   automata.cc
modified