Dutch transition with gettext() - first trial.
Made the NL | EN button functional. Translated a few more things.
Tanslated the whole website (feedback is welcome :))
Path of language file is now relative to index.php.
Use getcwd() instead of chdir().
Problem with locales (nl_NL and en_US) fixed. Changing the language to dutch now works
Merge branch 'dutch' into develop

Conflicts:
	index.php