Debounce the compile function of demo/repl.html
Debounce the compile function of demo/repl.html

This gets to be noticeable on slower computers or when you're trying to modify
a large program previously pasted into it.

BUG=https://code.google.com/p/traceur-compiler/issues/detail?id=100

Review URL: https://codereview.appspot.com/6744064
Patch from Ben Chan <usrbincc@yahoo.com>.

ericmckean/traceur-compiler,lintangarief/traceur-compiler,bazaarvoice/traceur-compiler,kittens/traceur-compiler,vicb/traceur-compiler,renie/traceur-compiler,bazaarvoice/traceur-compiler,mathiasbynens/traceur-compiler,sebmck/traceur-compiler,thlorenz/node-traceur,kittens/traceur-compiler,mduvall/traceur,ericmckean/traceur-compiler,pandoraui/traceur-compiler,arv/traceur-compiler,rossberg-chromium/traceur-soundscript,sid0818/traceur-compiler,arv/traceur-compiler,sid0818/traceur-compiler,bjlxj2008/traceur-compiler,bjlxj2008/traceur-compiler,lintangarief/traceur-compiler,mduvall/traceur,longze/traceur-compiler,wilsonokibe/traceur-compiler,mduvall/traceur,sebmck/traceur-compiler,sebgod/traceur-compiler,sebgod/traceur-compiler,pandoraui/traceur-compiler,rwaldron/traceur-compiler,vicb/traceur-compiler,johnjbarton/traceur-compiler,renie/traceur-compiler,google/traceur-compiler,longze/traceur-compiler,google/traceur-compiler,guybedford/traceur-compiler,wilsonokibe/traceur-compiler,johnjbarton/traceur-compiler,astralfoxy/mirai-traceur,rossberg-chromium/traceur-soundscript