fixing bug in 'resolve(..)' where 'then(..)' should have been called …

…async instead of sync, closes #45 closes #46

add support for IE8

fixing bug where Promise.resolve(null) throws

tweaking some internal logic that was unnecessary, closes #17

fixing more incorrect scheduling sequencing, RE: #25

fixing scheduling bug, per #25 closes #26

super minor tweak removing unnecessary param

tweaking scheduling queue to not have starvation and for perf

more file-size/perf tweaks

fixed bug where 'Promise.prototype' was never being set correctly, fi…

…xed inconsistency per #18 where 'then(..)' can now be this-borrowed