Update locale/es.js
Update locale/es.js

Unifying zona and área - línea and ruta. 
Removing unnecessary articles.
Making some texts shorter.
openstreetmap/iD,zbycz/iD,openstreetmap/iD,1ec5/iD,ngageoint/hootenanny-ui,mapmeld/iD,andreic-telenav/iD,tbicr/iD,andreic-telenav/iD,kartta-labs/iD,openstreetmap/iD,1ec5/iD,tbicr/iD,morray/iD,energiekollektiv/openmod.sh-id,bagage/iD,AndreasHae/iD,edpop/iD,ngageoint/hootenanny-ui,energiekollektiv/openmod.sh-id,bagage/iD,edpop/iD,1ec5/iD,edpop/iD,morray/iD,mapmeld/iD,kartta-labs/iD,AndreasHae/iD,AndreasHae/iD,zbycz/iD,bagage/iD,mapmeld/iD,kepta/iD,digidem/iD,ngageoint/hootenanny-ui,kepta/iD,kartta-labs/iD,digidem/iD