Added support for log stored in CMS_STORAGE.

Added support for custom value stored in CMS_STORAGE.
Added optional css classes addition to CMS_BLOCK output.
Refactored storage, to manage node from node module code only (or mostly).

TODO: improved view for a cms node, for now hardcoded.

examples/demo/site/scripts/node.sql

@@ -5,8 +5,9 @@ CREATE TABLE "nodes"(
   "revision" INTEGER,
   "type" TEXT NOT NULL,
   "title" VARCHAR(255) NOT NULL,
-  "summary" TEXT NOT NULL,
+  "summary" TEXT,
   "content" MEDIUMTEXT NOT NULL,
+  "format" VARCHAR(255),
   "author" INTEGER,
   "publish" DATETIME,
   "created" DATETIME NOT NULL,