Automatically refresh error list after syntax check
Improve naming of error display functions
Remove function to display errors in list

The error list is going to highlight the error at point automatically
now, so this function becomes superfluous.  I doesn't play well with
auto-refreshing error lists anyway.
Highlight errors at point in the error list
Refresh the error list when clearing Flycheck state
Update the changelog
Synchronize cursor on source buffer and errors list.
Don't throw user-error on FC disabled buffer. Just message.
Merge branch 'master' into origin-feature-auto-refresh-error-list

Conflicts:
	doc/flycheck.texi