add garden-cache doc

README.md

@@ -33,7 +33,8 @@ Java 8 or later.
    :head-tags [[:meta {:name "custom" :property "stuff"}]]
    :stylesheet-async "large-stuff.css" ; injects an async renderer(s)
    :script "/app.js" ; async by default
-   :garden-css [:h1 {:font-size :20px}] ; critical path css
+   :garden-css [:h1 {:font-size :20px}] ; critical path css (or just inline the whole thing)
+   :garden-css-cache? true ; uses simple-dimple memoize cache, so only lives in the lifecycle
 
    ; seo and meta
    :description "Like a notepad but cyberpunk"

src/page_renderer/api.clj

@@ -24,7 +24,7 @@
    Assets
    ^String  :stylesheet-async  - stylesheet filename, will be loaded asynchronously by script.
    ^String  :garden-css        - data structure for Garden CSS
-   ^Boolean :garden-css-cache? - should Garden CSS be cached.
+   ^Boolean :garden-css-cache? - should Garden CSS be cached. (default: false)
    ^String  :script-sync       - script name, will be loaded synchronously
    ^String  :js-module         - entry point for JS modules. If you prefer your scripts to be served as modules
    ^Boolean :skip-cachebusting?    - will skip automatic cachebusting if set. Defaults to false.