Add frontend assets and plugin bundles

Add the legacy frontend themes, scripts, and plugin assets required by the main SPOTA interfaces.

assets/plugins/flot/Makefile

@@ -0,0 +1,12 @@
+# Makefile for generating minified files
+
+.PHONY: all
+
+# we cheat and process all .js files instead of an exhaustive list
+all: $(patsubst %.js,%.min.js,$(filter-out %.min.js,$(wildcard *.js)))
+
+%.min.js: %.js
+	yui-compressor $< -o $@
+
+test:
+	./node_modules/.bin/jshint *jquery.flot.js