cleanup after bad errors

[drKnoxy]

Issue description:

I wasn't able to figure out how to test it, but on IE9 CORS issues just error out with a console message Error: Access is Denied and the module never reaches loaded event. This fixes that.

Issues this addresses

#258, #254, #249

relavent prs

#50

notes

• if there is no response or response.config that is an indicator of a bad error, we should throw in the towel and call it complete
• update error messages, log response so we can troubleshoot the issue

[faceleg]

I've merged your changes in here: https://github.com/faceleg/angular-loading-bar-plus

I contacted the owner about coming on as a contributor but he hasn't replied. I suggest using my fork as the focus of development from now on.

[faceleg]

After understanding how interceptors should work and discussing offline with @chieffancypants, I am in agreement with him that it should not be this module's job to handle incorrect interceptors. I'm therefore closing this.