make split edges visible only to the context that created them. addresses #1025.
temporary edge traversal should fail until visibleTo is set

addresses #1025
keep on adding i18n support to otp-leaflet-client

- trip planner is almost complete
- add Italian support
- some html code in BikeShareModule moved to widget-templates-html
associate all temp edges with a routing context. fix tests.
associate all temp edges with a routing context. fix tests.
Merge branch 'master' of github.com:opentripplanner/OpenTripPlanner
keep on adding i18n support to otp-leaflet-client + Italian translation

replace almost all string with otp.config.locale...
add Italian translation
move some html code in BikeStationsWidget.js to widget-templates.html
change some time formats
go for ISO8601 against the rest-servlet api in order to avoid localization problems on date formatting