PDF links in the README not rendering properly; redirect to another repo

[mbrukman]

The PDF links in the README.md ¹:

gs-collections-kata/README.md

Lines 9 to 11 in a028259

	New concepts are introduced in the [slides](http://www.goldmansachs.com/gs-collections/documents/GS Collections Training Session and Kata 5.0.0.pdf), with coding exercises at the end of each section. As you complete each exercise, you can check your answers against the [solutions branch](https://github.com/goldmansachs/gs-collections-kata/tree/solutions).
	Make sure you read the instructor notes in the slides. In addition, you can refer to the [GS Collections Reference Guide](http://www.goldmansachs.com/gs-collections/documents/GS Collections Reference Guide 5.0.0.pdf) for further detail and examples of the API.

appear to redirect to another repo: https://github.com/eclipse/eclipse-collections — is that intentional? If so, maybe it would make sense to update the links to point to the documentation that's hosted in that repo or elsewhere? As it is, it's confusing:

• the raw links aren't rendered correctly
• copy-pasting the full URLs to those PDFs redirects to another (seemingly unrelated) GitHub collections repo

Footnotes

1. Which don't render correctly because of embedded spaces, but that's another issue. ↩