tidytransit v1.1

• added filter_feed_by_* functions #168
• write_gtfs now correctly converts sf objects to gtfs csv tables (via sf_as_tbl) #168
• added gtfs_transform which runs sf::st_transform on shapes and stops #168
• added trolleybus and monorail to route_types
• update documentation and deployment

Merge pull request #105 from r-transit/cran-release-0.5.1

release update to CRAN

0.3.6: Merge pull request #48 from r-transit/patch-version

Patch version