Add Atom::isReleasedVersion, which determines if the version is a SHA

src/atom.coffee

@@ -361,6 +361,10 @@ class Atom
   getVersion: ->
     app.getVersion()
 
+  # Public: Determine whether the current version is an official release.
+  isReleasedVersion: ->
+    not /\w{7}/.test(@getVersion()) # Check if the release is a 7-character SHA prefix
+
   getGitHubAuthTokenName: ->
     'Atom GitHub API Token'