Edit: I am afraid, it is by-designed at the moment. Please take a look at this FAQ on meta
The post has been edited eight (8) times by the original owner.
It is to prevent, question bumping in The Stack Overflow Trilogy Sites.
but stackapps is very new, need to edit many times on those stuff, so you could probably request to raise the limit, may be 10 or 12 or more.
Or you could post demo page links, code samples as an answer, instead of adding those into question, IMO.