-Update from WebTranslator v3.0:
estonian - 6 changes by KSiimson


git-svn-id: http://svn.openttd.org/trunk@26176 6aa0318a-3be1-0310-93fa-89fd2396df07
-Update: documentation


git-svn-id: http://svn.openttd.org/trunk@26177 6aa0318a-3be1-0310-93fa-89fd2396df07