Add first version of the frontend

As of now the only usable functionality is signin in/out and managing
authorized users, and even then there is much room for improvement.

Change-Id: Ib87fc6866f69113a230187710de8644b78391917
diff --git a/.clang-format b/.clang-format
new file mode 100644
index 0000000..f6cb8ad
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1 @@
+BasedOnStyle: Google