explicitly specify app name

I've resisted this for some reason all these years, but finally
encountered a situation that requires it:

  $ love ./

This runs the app, but with an identity of 'lovegame'. So all new
save dir, etc.

1 files changed, 3 insertions, 0 deletions

diff --git a/conf.lua b/conf.lua
new file mode 100644
index 0000000..f69a6f6
--- /dev/null
+++ b/conf.lua
@@ -0,0 +1,3 @@
+function love.conf(t)
+  t.identity = 'lines'
+end