Pontoon: Update Spanish (es) localization of AMO
Pontoon: Update Spanish (es) localization of AMO

Localization authors:
- Peiying Mo [:CocoMo] <pmo@mozilla.com>
- avelper <avelper@mozilla-hispano.org>
- Matjaž Horvat <matjaz.horvat@gmail.com>

wagnerand/addons-server,bqbn/addons-server,psiinon/addons-server,eviljeff/olympia,mozilla/olympia,kumar303/olympia,mozilla/addons-server,kumar303/addons-server,bqbn/addons-server,wagnerand/addons-server,mozilla/addons-server,mozilla/addons-server,psiinon/addons-server,eviljeff/olympia,mozilla/olympia,diox/olympia,bqbn/addons-server,kumar303/addons-server,bqbn/addons-server,kumar303/addons-server,mozilla/olympia,psiinon/addons-server,eviljeff/olympia,mozilla/olympia,psiinon/addons-server,diox/olympia,kumar303/addons-server,wagnerand/addons-server,kumar303/olympia,wagnerand/addons-server,kumar303/olympia,mozilla/addons-server,kumar303/olympia,eviljeff/olympia,diox/olympia,diox/olympia