New TimeBox entity. Added relationships between TimeBox, Projects and
Workers.
TimeBoxLocalServiceImpl.java: add and delete methods. Service updated.
TimeBoxLocalServiceImpl.java: new method to get total dedicated time of
a worker in a project.
editTimeBox and deleteTimebox updated.
New entities Contacto and ContactoStatus, with new methods add and
delete contact in ContactoLocalServiceImpl.java.
Changed contactId to contactoId to avoid problems with Liferay's contact
entity.
Added custom-sql to filter contacts.
Added parameter Ctype to ContactoFinderImpl.java, add.jsp and view.jsp.
ContactoLocalServiceImpl.java: added method getProjects. Service
updated.
ProjectLocalServiceImpl.java: added finder by contactoId.