mentioned + for spaces in help (fixes #397)

README.md

@@ -39,6 +39,7 @@ request like this:
 
     $ curl wttr.in/London
     $ curl wttr.in/Moscow
+    $ curl wttr.in/Salt+Lake+City
 
 If you omit the location name, you will get the report for your current location based on your IP address.
 

share/help.txt

@@ -6,7 +6,7 @@ Usage:
 Supported location types:
 
     /paris                  # city name
-    /~Eiffel+tower          # any location
+    /~Eiffel+tower          # any location (+ for spaces)
     /Москва                 # Unicode name of any location in any language
     /muc                    # airport code (3 letters)
     /@stackoverflow.com     # domain name