Extra fixes and corrections

Thanks danricho

Author: CodeBizarre

README.md

@@ -21,8 +21,8 @@ aq = AircraftRequests(sm, _time=2000)
 # Use _time=ms where ms is the time in milliseconds to cache the data.
 # Setting ms to 0 will disable data caching and always pull new data from the sim.
 # There is still a timeout of 4 tries with a 10ms delay between checks.
-# If no data is received in 40ms the value will be set to -999999
-# Each request can be fine tuned by setting the time pram.
+# If no data is received in 40ms the value will be set to None
+# Each request can be fine tuned by setting the time param.
 
 # To find and set timeout of cached data to 200ms:
 altitude = aq.find("PLANE_ALTITUDE")
@@ -108,7 +108,7 @@ Arguments to pass:
 
 Description: Triggers an event in the simulator
 
-## Running SimConnect on another system.
+## Running SimConnect on a separate system.
 
 #### Note: At this time SimConnect can only run on Windows hosts.