Move libraries layout', model', `peristence' under cms folder

Updated code to the new layout.
Added missing comments.
Remove /example/api

cms/persistence/implementation/sqlite/scripts/Readme.txt

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+Added Stored Procedures

cms/persistence/implementation/sqlite/scripts/create_database.sql

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+-- Creator:       MySQL Workbench 6.1.7/ExportSQLite plugin 2009.12.02
+-- Author:        javier
+-- Caption:       New Model
+-- Project:       Name of the project
+-- Changed:       2014-09-16 23:12
+-- Created:       2014-09-16 23:12
+PRAGMA foreign_keys = OFF;
+
+-- Schema: cms_dev
+BEGIN;
+CREATE TABLE "nodes"(
+  "id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL CHECK("id">=0),
+  "publication_date" DATE NOT NULL,
+  "creation_date" DATE NOT NULL,
+  "modification_date" DATE NOT NULL,
+  "title" VARCHAR(255) NOT NULL,
+  "summary" TEXT NOT NULL,
+  "content" MEDIUMTEXT NOT NULL
+);
+CREATE TABLE "roles"(
+  "id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL CHECK("id">=0),
+  "role" VARCHAR(100) NOT NULL,
+  CONSTRAINT "role"
+    UNIQUE("role")
+);
+CREATE TABLE "users"(
+  "id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL CHECK("id">=0),
+  "username" VARCHAR(100) NOT NULL,
+  "password" VARCHAR(100) NOT NULL,
+  "salt" VARCHAR(100) NOT NULL,
+  "email" VARCHAR(250) NOT NULL,
+  CONSTRAINT "username"
+    UNIQUE("username")
+);
+CREATE TABLE "users_nodes"(
+  "users_id" INTEGER NOT NULL CHECK("users_id">=0),
+  "nodes_id" INTEGER NOT NULL CHECK("nodes_id">=0),
+  PRIMARY KEY("users_id","nodes_id"),
+  CONSTRAINT "fk_users_has_nodes_nodes1"
+    FOREIGN KEY("nodes_id")
+    REFERENCES "nodes"("id"),
+  CONSTRAINT "fk_users_has_nodes_users"
+    FOREIGN KEY("users_id")
+    REFERENCES "users"("id")
+);
+CREATE INDEX "users_nodes.fk_users_has_nodes_nodes1_idx" ON "users_nodes"("nodes_id");
+CREATE INDEX "users_nodes.fk_users_has_nodes_users_idx" ON "users_nodes"("users_id");
+CREATE TABLE "users_roles"(
+  "users_id" INTEGER NOT NULL CHECK("users_id">=0),
+  "roles_id" INTEGER NOT NULL CHECK("roles_id">=0),
+  PRIMARY KEY("users_id","roles_id"),
+  CONSTRAINT "fk_users_has_roles_roles1"
+    FOREIGN KEY("roles_id")
+    REFERENCES "roles"("id"),
+  CONSTRAINT "fk_users_has_roles_users1"
+    FOREIGN KEY("users_id")
+    REFERENCES "users"("id")
+);
+CREATE INDEX "users_roles.fk_users_has_roles_roles1_idx" ON "users_roles"("roles_id");
+CREATE INDEX "users_roles.fk_users_has_roles_users1_idx" ON "users_roles"("users_id");
+COMMIT;

cms/persistence/implementation/sqlite/scripts/tables.sql

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+DROP TABLE IF EXISTS nodes;
+
+CREATE TABLE nodes
+(
+	id smallint unsigned NOT NULL auto_increment,
+	publication_date date NOT NULL,  #When the article was published
+	creation_date  date  NOT NULL, #When the article was created
+	modification_date  date  NOT NULL, #When the article was updated
+	title varchar(255) NOT NULL, #Full title of the article
+	summary text NOT NULL, #A short summary of the articule
+	content mediumtext NOT NULL,  #The HTML content of the article
+
+	PRIMARY KEY (ID)
+);