Update es.po file from transifex
Update from transifex
Mark some networking images as not needing translation

The network status icon images contain no written text and will never
need translation, so they should be marked as such
Fix small inaccuracies in english copy

As we were translating we noticed a few places the english text needed
fixing up
Merge pull request #9 from endlessm/translation-fixes

Translation fixes
Update pot file
Update from transifex