Update nl.properties

Original translation was already good, I changed some lines to make it a bit more fluent and corrected some small mistakes. Also added capitals to the beginning of each sentence and in case of fragments used capitals for each word (e.g. Next Page i.s.o. Next page) to increase consistency. 

Shouldn't we use the more formal 'u' in stead of 'je'? I understand the arguments for both, but when in doubt I prefer a more formal version. Also this is more normal in Flemish, who will also use Dutch localisation.
move the join on entries as the first join
Merge pull request #94 from xouns/patch-1

Update nl.properties
Merge pull request #95 from LpSamuelm/master

Added Swedish translation
added german
Create fi.properties

Finnish translation, some bits with fixed links in them might be a bit clumsy
Update languages.properties

Added Finnish
Merge pull request #99 from JKakku/patch-1

Added Finnish translation
rollback inner join changes, left joins actually enforce order
hungarian translation
some welcome page styling
show both about and donate on the button
Create ru.properties
Update languages.properties

Added Russian language and alphabetical order
Merge pull request #103 from ArtTea/patch-1

Create ru.properties
Merge pull request #104 from ArtTea/patch-2

Update languages.properties
fix (#105)
fix #106
fix openshift build
links to browser extension repositories