Add technote: Roadmap.

Technotes/Roadmap.md

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+# Roadmap
+
+<i>Updated Dec. 23, 2017</i>
+
+This roadmap reflects thinking at the time of the last update. Anything can change at any time.
+
+## Evergreen 1.0 for macOS
+
+Ship: March 26, 2018 (we hope!)
+
+Features:
+
+* Standalone feed reading (unsynced)
+* Syncing via FeedBin
+* Built-in smart feeds (today, starred, all unread)
+* Searching
+* Starring
+* Keyboard shortcuts
+* Multiple windows
+* Feed Directory
+* AppleScript support
+* Inspector
+* Gestures
+* Notifications
+* Sharing
+* Share extension
+* Feed and user avatars
+* Microblog full-post rendering in the timeline
+* Thumbnail images in the timeline
+
+Milestones:
+
+[Evergreen 1.0 alpha](https://github.com/brentsimmons/Evergreen/milestone/1)<br />
+[Evergreen 1.0 beta](https://github.com/brentsimmons/Evergreen/milestone/2)<br />
+[Evergreen 1.0](https://github.com/brentsimmons/Evergreen/milestone/3)
+
+(See [What Development, Alpha, Beta, and Final Mean for Evergreen](DevelopmentAlphaBeta.md) for definitions.)
+
+## Evergreen 2.0 for macOS
+
+Ship: March 26, 2019 (seems unlikely)
+
+Features:
+
+* Syncing via Feedly and other similar systems — not yet decided which ones exactly
+* Syncing via CloudKit (maaaaaybe, if feasible)
+* Smart feeds — edit and create
+* Filters that run during refresh
+* Scripted feeds (AppleScript and shell/Ruby/etc.)
+* Hiding read subscriptions
+* Hiding read articles
+* Deleting articles
+
+Milestones:
+
+[Evergreen 2.0 alpha](https://github.com/brentsimmons/Evergreen/milestone/4)
+[Evergreen 2.0 beta](https://github.com/brentsimmons/Evergreen/milestone/5)
+[Evergreen 2.0](https://github.com/brentsimmons/Evergreen/milestone/6)