state sync, many changes:

* separated css/js/rule files to pak file (glorified zip) to reduce full rebuilds
* implemented build cache
* some frontend UI spiffing up

.gitignore

@@ -1,5 +1,11 @@
 .vscode/**
 scratch.ipynb
 .docker-login-credentials
+
 seagull
-build/**
+seagull.pak
+build/**
+build_cache/**
+
+**/__pycache__/**
+**.pyc