localise donate text

update readme

remove unused var

release 1.6.4:

 - Fixes issues with buttons sometimes not appearing on search by image pages

Fix issue bijij#54

release 1.6.2:

 - add dutch locales
 - fix issues with larger images urls
 - disable more sizes url

XUL Extension release 1.0

release 1.6.1:

 - fix issue with buttons sometimes not appearing
 - clean up options page for future toggles

release 1.5.5

- add Taiwanese Mandarin and Hungarian locales
- add globe image to "View image" button

Added Turkish locales (bijij#33)