I have fixed the bug.
I also think they should be be part of the default palette. I'll add them in (build 8974).
2016-01-27 13:25:54,216 INFO [Thread-13] stencyl.sw.util.StreamGobbler: [haxelib.exe] C:/Program Files (x86)/Stencyl/plaf/haxe/lib/openfl/openfl/openfl/Assets.hx:6: characters 7-22 : Type not found : lime.app.Future2016-01-27 13:25:54,246 DEBUG [pool-1-thread-2] stencyl.sw.util.Util: Process 'haxelib.exe' exited with code: 12016-01-27 13:25:54,246 ERROR [pool-1-thread-2] stencyl.sw.io.write.resource.HXWriter: Failed: Building for Flash. (Return code: 1)2016-01-27 13:25:54,247 ERROR [pool-1-thread-2] stencyl.sw.util.dg.MessageDialog: Encountered errors while building your game.: Check your logs and post them to the forums. - Please describe what you have been doing. Be as specific as possible. 2016-01-27 13:25:56,759 DEBUG [pool-1-thread-3] stencyl.sw.util.FileHelper: Matching (non-hidden) files within C:\Users\LIBERADO\AppData\Roaming\Stencyl\stencylworks\logs: [C:\Users\LIBERADO\AppData\Roaming\Stencyl\stencylworks\logs\2016-01-27_13-25-24.log]