Add wp_stream_db setting to field labels
Refactor author usage into WP_Stream_Author class; use System user always
Fix assignment alignment issue for PHPCS
Use Unknown user instead of System user
Fix coding style to use elseif
Use N/A instead of Unknown
Remove unused variable
Introduce author agent concept and logging WP Cron

See #431
Solves #457
Merge pull request #463 from x-team/issue-444

Add wp_stream_db setting to field labels
Essentially a port of WP Internal Pointers for Stream. Needs work to allow extensions to hook into it.
Use global $wp_roles instead of $_GLOBALS['wp_roles']

Possible fix for #468
 global fallback
Change some variable names
Single statement blocks still need brackets
Add filter for menu position | Solution to #99
Merge pull request #473 from x-team/issue-99

Add filter for menu position | Solution to #99
Modified to allow other extensions to more easily add their own admin pointers through this class.
Merge remote-tracking branch 'origin/develop' into issue-466
Fixed phpcs errors.