Merge pull request #12 from sgargan/check_api

Addition of Checks API to agent
tweak timings to make the tests more robust
tweak timings to make the tests more robust
add TODO for wan flag
tweak timings to make tests more robust
add a deprecation warning to health.check.ttl_pass
Slim down agent.check.register to only wrap the agent/check/register call;
add notes parameter;
assert that either a script or a ttl is supplied
flake8 fix
tweak timings to make tests more robust
add agent.check to the docs
update docstring for check.deregister
typo
bump version
tweak timings to make tests more robust
tweak timings to make tests more robust
tweak timings to make tests more robust
tweak timings to make tests more robust
tweak timings to make tests more robust
Fix typo to allow Health Checks to use the Notes field.
Merge pull request #14 from ShaheedHaque/srh_fix_notes

Fix typo to allow Health Checks to use the Notes field.