Observable.merge is not a function

[medmor]

this issu comes from the spell-check-handler.js line 240 Observable.merge(this.spellCheckInvoked, this.currentSpellcheckerChanged)
if i change this to this.spellCheckInvoked.merge(this.currentSpellcheckerChanged) and alse the same in line 254. all works well.

[jsnajdr]

#107 has the right fix for this. Only needs to be merged and published.