Almost full support for ordered_match()

possessive repeat doesn't work yet.

Author: leni536

.gitignore

@@ -2,6 +2,7 @@
 *.d
 test
 result
+test_ordering
 tests/benchmark-exec/*
 !tests/benchmark-exec/*.cpp
 *.pyc
@@ -10,4 +11,4 @@ mtent12.txt
 *.zip
 tests/benchmark-range/*
 !tests/benchmark-range/*.cpp
-!tests/benchmark-range/*.hpp
+!tests/benchmark-range/*.hpp