Update changelog to 5.0.0 RC1

CHANGELOG.md

@@ -1,3 +1,17 @@
-# 5.0.0
+# 5.0.0 RC1
    - Renamed osrm-prepare into osrm-contract
    - osrm-contract does not need a profile parameter anymore
+   - New public HTTP API, find documentation [here](https://github.com/Project-OSRM/osrm-backend/wiki/New-Server-api)
+   - POST support is discontinued, please use library bindings for more complex requests
+   - Removed timestamp plugin
+   - Coordinate order is now Longitude,Latitude
+   - Cucumber tests now based on Javascript (run with `npm test`)
+   - Profile API changed:
+      - `forward_mode` and `backward_mode` now need to be selected from a pre-defined list
+      - Global profile properties are now stored in a global `properties` element. This includes:
+        - `properties.traffic_signal_penalty`
+        - `properties.use_turn_restrictions`
+        - `properties.u_turn_penalty`
+        - `properties.allow_u_turn_at_via`
+
+