Controller update

New AJAX examples to handle
Brand new JPA entities

In-memory data removed
PersonService

Interface and JPA implementation updated
Spring configuration updated
New AJAX-enabled Spring controller
New DAO using JPA
Creation/loading SQL scripts
Tiles conf updated

All views moved to WEb-INF\views\
New AJAX examples
All views moved to WEB-INF\views
Logback conf updated
POM cleaned
.gitignore updated