In pilex:

* Option to build python lexer without groups (simpler skeleton, more like flex)

In pitree:
* Add a top level Makefile

diff --git a/pilex b/pilex
index 296b1f0..73b0df9 160000 (submodule)
--- a/pilex
+++ b/pilex
@@ -1 +1 @@
-Subproject commit 296b1f02af7e1364c0e1337db44d7bd9e5cf1a2a
+Subproject commit 73b0df9b6fce0a0fadef188cd2cda6af0cabf755

diff --git a/pitree b/pitree
index 0f3de1a..df11777 160000 (submodule)
--- a/pitree
+++ b/pitree
@@ -1 +1 @@
-Subproject commit 0f3de1aaeec38bc25bb1f1fc8d96f1527a634d0b
+Subproject commit df11777a4af1b943c3d319108231c0297f5a1dc2