Adds a .pylintrc for linting

This patch adds a .pylintrc file to whitelist errors about missing
sources for the netifaces module.
diff --git a/.pylintrc b/.pylintrc
new file mode 100644
index 0000000..aedec0b
--- /dev/null
+++ b/.pylintrc
@@ -0,0 +1,2 @@
+[MASTER]
+extension-pkg-whitelist=netifaces