Adds Dutch Translations.

These are a ridumentary first pass, as according to
https://github.com/lefnire/habitrpg/wiki/Translations the localization
implementation is still in a state of flux. Hopefully these can serve
a temporary use in the meanwhile.
Make capitalization consistent with English
Should be single words, typo fix
Fix pet names
These colours should be single words
Thesis is the correct word here
Todo translations modified
Merge
Merge branch 'develop' of github.com:lefnire/habitrpg into develop
Merge pull request #1 from xeross/locale/nl

Locale fixes/changes
Merge branch 'locale/nl' of github.com:jbnicolai/habitrpg into develop
Merge