* doLog accepts a label
* Use PromiseLike instead of Promise in fromPromise functions
Bacon accepts Promises/A+ -compatible promises that have just the .then
function, so the full Promise type is not actually required.
This also removes the need for the JQueryXHR special case, because
JQueryXHR is compatible with PromiseLike.
* Restore JQueryXHR special case to fromPromise
With strictNullChecks JQueryXHR is not compatible with PromiseLike.
The baconjs typings don't have strictNullChecks at the moment, so tsc
didn't catch this...
* Flatten contributors' list
