Improve Spanish (Spain) translations

Changes: Add some translations to Spanish (I'm from Spanin)
Merge pull request #1200 from Airunedz/patch-1

Improve Spanish (Spain) translations
Added new level "K-means++ Cluster Wars"

Added new level "K-means++ Cluster Wars"
Merge pull request #1205 from Darredevil/patch-9

Added new level "K-means++ Cluster Wars"
Merge branch 'master' into production