Adding .git submodule

.gitignore

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..2092480
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,9 @@
+calibre*
+.*
+!.git*
+_*
+*.log
+cds.*
+simulations
+libs
+README
\ No newline at end of file

.gitmodules

diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..c73b442
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "caravel-lite"]
+	path = caravel
+	url = https://github.com/efabless/caravel-lite