New es locale and a new locale entity

Tested and working. I also added a new entity in every locale to
discriminate Pipelining group label and Pipelining checkbox label, to be
able to include extra info on the former and not to repeat it. I
included these, and no other extra changes, in tweak.jar
Merge pull request #1 from strel/master

New es locale, a new locale entity, and a localization entity fix