Added CMS_CORE_MODULE which is the mandatory module for ROC CMS.

Added CMS_USER.profile_name .
Improved module managements with install vs enable.
  - enabled/disabled status can also be stored in database.
Install procedure do not install all available modules anymore.

examples/demo/site/modules/oauth20/scripts/install.sql

@@ -0,0 +1,18 @@
+
+CREATE TABLE oauth2_consumers(
+   `cid` INTEGER PRIMARY KEY NOT NULL CHECK(`cid`>=0),
+   `name` VARCHAR(255) NOT NULL,
+   `api_secret` TEXT  NOT NULL,
+   `api_key` TEXT NOT NULL,
+   `scope` VARCHAR (100) NOT NULL,
+   `protected_resource_url` VARCHAR (255) NOT NULL,
+   `callback_name` VARCHAR(255) NOT NULL,
+   `extractor` VARCHAR(50) NOT NULL,
+   `authorize_url` VARCHAR (255) NOT NULL,
+   `endpoint`  VARCHAR (255) NOT NULL,
+   CONSTRAINT `cid`
+    UNIQUE(`cid`),
+   CONSTRAINT `name`
+    UNIQUE(`name`)
+   );
+