Add requirements.txt to make it easier to install vobject

Include the vobject requirement and pin at the latest release.
Usage: pip install -r requirements.txt

diff --git a/requirements.txt b/requirements.txt
new file mode 100644 (file)
index 0000000..e29047e
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1 @@
+vobject==0.8.1c