add locking http client
remove test/runner, rake works better
remove old locking client
fix bug, @options should actually use the initialized arg
add option for using locking http client
Merge remote-tracking branch 'origin/master' into rework_locking_client_to_only_lock_around_http_requests

Conflicts:
	lib/rets.rb
remove require for old locking client
Merge pull request #35 from estately/rework_locking_client_to_only_lock_around_http_requests

Rework locking client to only lock around http requests