Merge branch 'develop'

additional translations,

names for routes and alternatives,
route description markers visible on map when hovering over
the description

leaflet 0.4.4,

multiple routing engines,
qr codes,
gui buttons

alternative routes,

sorted nominatim search results,
additional languages,
and more

version v0.1.6

added translations

added printing support

version 0.1.4

(main new feature: localization)

bugfix release