- Add msavin:userCache.

  https://forums.meteor.com/t/introducing-a-new-approach-to-meteor-user-this-simple-trick-can-save-you-millions-of-database-requests/45336/7
  https://github.com/msavin/userCache

Thanks to msavin and xet7 !

Related #1672

.meteor/packages

@@ -87,3 +87,4 @@ momentjs:moment@2.22.2
 atoy40:accounts-cas
 browser-policy-framing
 mquandalle:moment
+msavin:usercache

.meteor/versions

@@ -118,6 +118,7 @@ mquandalle:jquery-ui-drag-drop-sort@0.2.0
 mquandalle:moment@1.0.1
 mquandalle:mousetrap-bindglobal@0.0.1
 mquandalle:perfect-scrollbar@0.6.5_2
+msavin:usercache@1.0.0
 npm-bcrypt@0.9.3
 npm-mongo@2.2.33
 oauth@1.2.1