Add test for respond_ok
Add test for respond_error
Correct response tests; add tests for unimplemented http methods
Add test for invalid http protocol
Add base implementation of http_server
all (?) tests written
http_server functions stubbed out
error classes stubbed, all tests fail, as they should
changed test_respond_error for appropriate message sending.  Implemented respond_error() and respond_ok().  Both pass tests.
parse_req_for_URI implemented.  All tests pass!
Add error handling and update server loop to parse request/return response
Update README