R1:ba7723d9057b

Modernize Macro application

Summary: Adds feed, email, notifications, comments, partial editing, subscriptions, enable/disable, flags and crumbs to Macro.

Test Plan:
{F26839}
{F26840}
{F26841}
{F26842}
{F26843}
{F26844}
{F26845}

Reviewers: vrana, btrahan, chad

Reviewed By: vrana

CC: aran

Maniphest Tasks: T2157, T175, T2104

Differential Revision: https://secure.phabricator.com/D4141