Add methods to make it easier to start a server without signal capturing.

Change-Id: Ib90820d19af3b53f67d66367801a307b39648db9
update examples to use new helper server brokering methods.

Change-Id: Ib0841a9d2356f32e4e4c565278f9bc7f1a5d09f8
Update the server tests to verify that new methods work as intended.

Change-Id: I656dac61c33d02a5c907f5fca90340431094b4e2
Merge pull request #47 from robertmaynard/server_easy_brokering_api

Make the server have an easier API to enable or disable signal catching.