Usuarios CRUD
Crud usuarios finished, and layout
Database
 Merge branch 'master' of https://github.com/ipereda/F-for-timeline

Conflicts:
	public/usuarios.txt
 Merge branch 'master' of https://github.com/agustincl/F-for-timeline

Conflicts:
	docs/model.mwb
	docs/model.mwb.bak
	scripts/structure.sql