Updated Readme.md

Readme.md

@@ -9,20 +9,25 @@ This tool checks VATSIM METARs and preselects the runways for you.
 ## Configuration
 The configuration file is located in `arse.json`. Edit it to your needs.
 
+### Config preamble
 `rwy_file` must point to the location of the `.rwy` file (corresponding to your sector file).
 The following are optional configuration options:
 * `no_factor_wind` - wind, below which the wind direction is ignored for runway assigment
 * `pref_wind` - wind, below which the wind direction is ignored when preferred runway list is used
 * `assumed_wind_dir` - wind direction that is assumed when it is unknown
 
+### Airport config
 `airports` is a list of all processed airports. It has the following required properties:
 * `icao` - the ICAO code
-* `runways` - a list of runways of the airport
+* `runways` - a list of runways of the airport 
+
 The following optional properties can be set:
 * `use_metar_from` - ICAO of an airport to get the METAR from. Useful for airports that do not have METARS available on VATSIM.
-* `preferred_dep` - an ordered list of preferred departure runway ids
-* `preferred_arr` - an ordered list of preferred arrival runway ids.
+* `preferred_dep` - an ordered list of preferred departure runway ids,
+* `preferred_arr` - an ordered list of preferred arrival runway ids,
+* `no_factor_wind` - overrides `no_factor_wind` for given airport.
 
+### Runway config
 A `runway` consists of following properties:
 * `id` - a string identifying a runway, must be the same as the runway ID in sector file (e.g. `"07L"`)
 * `true_heading` - true heading of the runway, used to calculate wind angular difference