implement step timing function
Merge remote-tracking branch 'origin/master' into randy/timing-func-step2
Merge branch 'master' of https://github.com/adobe/brackets into randy/timing-func-step2
Tweaked spacing.
close on escape key
merge latest from master
add info text to timing function editors
Merge remote-tracking branch 'origin/master' into randy/timing-func-step2
use arrow key symbols
Merge remote-tracking branch 'origin/master' into randy/timing-func-step2
Tweaked timing function info.
remove . at end of line
Merge pull request #5799 from adobe/randy/timing-func-step2

Implement steps() timing function editor