Updated Login Module.

- OAUTH LOGIN: is generic based on a new OAUTH_20_GENERIC_API
        - Storage (at the moment only SQL) for OAUTH_CONSUMER configuration.
        - OAUTH login and callback are generic.
        - Added a OAUTH_20_GENERIC_API.
        - Added scripts and templates to build the new OAUTH tables.
        - Fixed CMS_STORAGE_SQL_I.check_sql_query_validity issue.
        - Extended CMS_STORAGE_SQL_I, to execute scripts with paramerters.
        - Updated filter, now it's generic for every OAUTH consumer.

examples/demo/site/scripts/oauth2_consumers.sql

@@ -0,0 +1,20 @@
+BEGIN;
+
+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")
+   );
+
+COMMIT;

examples/demo/site/scripts/oauth2_consumers_initialize.sql

@@ -0,0 +1,11 @@
+BEGIN;
+
+	-- Change the values `TO_COMPLETE' based on your API.
+	-- API SECTET KEY AND API PUBLIC KEY 
+
+INSERT INTO "oauth2_consumers" ("name", "api_secret", "api_key", "scope", "protected_resource_url", "callback_name", "extractor", "authorize_url", "endpoint") 
+VALUES ("google", 'TO-COMPLETE', 'TO-COMPLETE', 'email', 'https://www.googleapis.com/plus/v1/people/me', "callback_google", "json","https://accounts.google.com/o/oauth2/auth?response_type=code&client_id=$CLIENT_ID&redirect_uri=$REDIRECT_URI","https://accounts.google.com/o/oauth2/token");
+INSERT INTO "oauth2_consumers" ("name", "api_secret", "api_key", "scope", "protected_resource_url", "callback_name", "extractor", "authorize_url", "endpoint" ) 
+VALUES ("facebook", 'TO-COMPLETE', 'TO-COMPLETE', 'email', 'https://graph.facebook.com/me', "callback_facebook","text","https://www.facebook.com/dialog/oauth?response_type=code&client_id=$CLIENT_ID&redirect_uri=$REDIRECT_URI","https://graph.facebook.com/oauth/access_token");
+
+COMMIT;

examples/demo/site/scripts/oauth2_template.sql

@@ -1,9 +1,9 @@
 BEGIN;
 
 
-CREATE TABLE "oauth2_gmail"(
+CREATE TABLE :table_name (
    "uid" INTEGER PRIMARY KEY NOT NULL CHECK("uid">=0),
-   "access_token" VARCHAR(255)  NOT NULL,
+   "access_token" TEXT  NOT NULL,
    "created" DATETIME NOT NULL,
    "details" TEXT NOT NULL,
    CONSTRAINT "uid"