Changes

tsk56 Unifies the team views with competition views
The team views were reconstructed to unify and have the same theme as 
competition views.Some required validators where removed cause that 
fields were optionals when creating or editing teams. A problem when 
editing a team appears: actually the "team id" is the name. If the team 
name was edited, the entity manager creates a new team and and keeps the
not edited team in the database. The right solution for this problem is
to add a real ID for the team (it should be done in the future) but the
temporally solution is to check if the user has modified the team name,
in this case the entity manager creates the modified team and deletes
the not modified.