caravel sync to mpw-3 tag

.gitmodules

diff --git a/.gitmodules b/.gitmodules
index e69de29..4798126 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "caravel"]
+	path = caravel
+	url = https://github.com/efabless/caravel-lite.git

caravel

diff --git a/caravel b/caravel
new file mode 160000
index 0000000..0f16ba8
--- /dev/null
+++ b/caravel
@@ -0,0 +1 @@
+Subproject commit 0f16ba8eaae841a6f122fc0d5837005d3312fd2b