Add useful Nim link resources

Add this to the resource section of nim

**To install use choosenim**
- https://github.com/dom96/choosenim

**Tutorial:**
- https://narimiran.github.io/nim-basics/
- https://nim-lang.org/learn.html
- https://nim-by-example.github.io/

**Video Tutorial:**
- https://invidio.us/playlist?list=PLvwc2YT9MFOlPPexrsY-t7BNTdg2Vsx06

**Book:**
- https://www.manning.com/books/nim-in-action
- https://xmonader.github.io/nimdays/

**Awesome List:**
- https://github.com/VPashkov/awesome-nim

**Rosettacode**
- http://rosettacode.org/wiki/Category:Nim

**Chat/Forum**
- https://gitter.im/nim-lang/Nim
- https://forum.nim-lang.org/

**Just a review from some guys**
* https://www.quora.com/q/rjkfuyxmrnnbmjjx/To-Nim-or-not-to-Nim
* https://www.quora.com/What-is-your-review-of-Nim-programming-language