po/es.po: Add Spanish translations
Merge pull request #344 from pilarmolinalopez/master

i18n: add Spanish translation

Signed-off-by: David Aguilar <davvid@gmail.com>
doc: add Pilar to the credits

Signed-off-by: David Aguilar <davvid@gmail.com>
doc: update v2.0.6 release notes draft

Signed-off-by: David Aguilar <davvid@gmail.com>