add kissfft library

diff --git a/.gitmodules b/.gitmodules
new file mode 100644 (file)
index 0000000..b12dc4a
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "kissfft"]
+       path = kissfft
+       url = https://github.com/mborgerding/kissfft

diff --git a/kissfft b/kissfft
new file mode 160000 (submodule)
index 0000000..8f47a67
--- /dev/null
+++ b/kissfft
@@ -0,0 +1 @@
+Subproject commit 8f47a67f595a6641c566087bf5277034be64f24d