Merge pull request #6 from petkaantonov/master

add generators version of bluebird
Merge pull request #7 from petkaantonov/master

Improve debuggability.js

Only generate callback-based stack trace for callback-based solutions.
separate callback stack + longStackSupport
remove previous global flag
Make it work cross-platform.

More robust finding of the initial line

Sort results which have same distance alphabetically