Records for phase 1

This diary is for recording my progress on the program and show the effect after every edit.

1: Z-index is added to the way with the selector [partOfActiveRoute] to make the target route float on the top of the map.

2: Add features in mapcss files to achieve the function that ways under the route relation of same type as the selected relation of route are painted in light gray and ways unsuitable for that are painted in dark gray.

3: Listing distance from next and previous stops and relation routes in the dropdown of clicked stop