Several spelling and grammatical fixes.

docs/Command Lookup.md

@@ -1,6 +1,6 @@
 # Command Lookup
 
-`OBDCommand`s are objects used to query information from the vehicle. They contain all of the information neccessary to perform the query, and decode the cars response. Python-OBD has [built in tables](Command Tables.md) for the most common commands. They can be looked up by name, or by mode & PID.
+`OBDCommand`s are objects used to query information from the vehicle. They contain all of the information necessary to perform the query and decode the car's response. Python-OBD has [built in tables](Command Tables.md) for the most common commands. They can be looked up by name or by mode & PID.
 
 ```python
 import obd