Merge pull request #40 from ScriptRock/paul

external id and settings update
fixed custom service user install command example
Merge pull request #41 from ScriptRock/steve

fixed custom service user install command example
Added docs for jobs/[id]/tasks in API and put more description around using API keys
added docs for jobs/[id]/tasks with a list of statuses to filter for
fix download links
Merge branch 'master' into steve
added a series of updates for windows agent 2.7.0 to 2.7.9
Merge pull request #43 from ScriptRock/paul

lookup using external id
Merge pull request #42 from ScriptRock/steve

Added docs for jobs/[id]/tasks in API and put more description around us...
update
Merge branch 'master' into paul