Image lookup (#412)

* get rid of map on tid -> Image

* turn off profiling

Author: tballmsft

app.ts

@@ -17,7 +17,6 @@ namespace microcode {
 
                 controller.setRepeatDefault(250, 30)
                 keymap.setupKeys()
-                icons.init()
 
                 // start jacscript
                 jdc.setParameters(