problem with \ vs / in file path in Windows

[kbdguy]

A new issue that I bumped into because angular2 seed uses systemjs-builder. Something changed recently and people are getting errors like "Error on fetch for dist\tmp\app\main.js at file:///C:/dev/angular2-seed/node_modules/dist\tmp\app\main.js". Note the inconsistent slashes in that file path. Probably introduced in v 0.15.20

[guybedford]

SystemJS should always be dealing with / style paths. There may be inconsistencies around the behaviour of \ due to the use of a URL polyfill to handle normalization here. According to the URL spec we should let \ be turned into a / through the resolution process though... I've created systemjs/systemjs#1317 but let me know if that doesn't capture it too.