Work on http server, more events added, updated diagrams
Events:
-added light level change event
-added proximity event
-added sound level exceeded event
-added temperature change event

SimpleHttpServer.java:
-moved all handlers inside SimpleHttpServer.java since they can not be used elsewhere in the project
-added processQueryString to return a hashmap representing the query string (i.e. ?foo=bar&yes=no yields a hash map like "foo"->"bar", "yes"->"no")
-changed get_running_drivers to call the correct method in Coordinator
-added skeleton handlers for some other URI requests

Diagrams for presentation:
-added duplicate diagram for user query (this one done in Visio)
-added flowchart for a basic driver's run() method