update translations
add new geometry types to list of OverpassQL keywords

(and remove unimplemented quirks keyword)
update presets
add "tags" as keyword (a new Overpass API print-mode)
fix links to geojson.io (export->geojson as gist)
remove oldish examples page

(there is a wiki page which is a better place to maintain such examples:
http://wiki.openstreetmap.org/wiki/Overpass_turbo/Examples)
update changelog
Merge branch 'master' into gh-pages