Merge pull request #180 from trustmaster/master

Grouping by field support in `GroupComponent`
Mention GroupComponent in CHANGES
Mention GroupComponent in CHANGES
Fix the browser build
Typo fix
Initial AppVeyor Windows CI config
Easier uptime check on Windows
Show Windows CI status
Windows timing issues workaround
Update noflo-manifest dep
Stack overflow link in README
More work on #166:
 - Renamed `GroupComponent` to `GroupedInput`
 - Moved options before func, func is the last argument now, which is easier to compose
 - Added advanced group forwarding option: no forwarding, forwarding from specific port(s), forwarding from all ports