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/blog/scripts/install.sql

@@ -1,6 +0,0 @@
-CREATE TABLE blog_post_nodes(
-  `nid` INTEGER NOT NULL CHECK("nid">=0),
-  `revision` INTEGER NOT NULL,
-  `tags` VARCHAR(255),
-  CONSTRAINT PK_nid_revision PRIMARY KEY (nid,revision)
-);