Merge branch 'fix-whitepaper' into 'develop'

fix: remove bluepaper and update whitepaper link

See merge request !46

_resources/bluepaper.md

----
-title: Bluepaper
-position: 2
----
-
-The Hive Bluepaper describes how the Hive blockchain works, and provides an overview of the key features.
-
-[https://steem.com/steem-bluepaper.pdf](https://steem.com/steem-bluepaper.pdf)

_resources/client_libs.md

 ---
 title: Client Libraries
-position: 2
+position: 3
 ---
 
 **Radiator** - [https://github.com/inertia186/radiator](https://github.com/inertia186/radiator)

_resources/developeradvocate.md

 ---
 title: Community & Help
-position: 6
+position: 7
 ---
 <!--
 **Developer Advocate**

_resources/tools.md

 ---
 title: Tools
-position: 3
+position: 6
 ---
 
 **ChainSync** - [https://github.com/aaroncox/chainsync](https://github.com/aaroncox/chainsync)

_resources/whitepaper.md

 ---
 title: Whitepaper
-position: 3
+position: 2
 ---
 
 The Hive Whitepaper provides a more in depth technical analysis of how the Hive blockchain operates.
 
-[https://steem.com/HiveWhitePaper.pdf](https://steem.com/HiveWhitePaper.pdf)
+[https://hive.io/whitepaper.pdf](https://hive.io/whitepaper.pdf)

readme.md

@@ -16,6 +16,12 @@ Install the dependencies with [Bundler](http://bundler.io/):
 $ bundle install
 ~~~
 
+In case of installation problems, make sure you have a ruby development environment installed. If not, install it with:
+
+```bash
+sudo apt-get install ruby-dev
+```
+
 Run `jekyll` commands through Bundler to ensure you're using the right versions:
 
 ~~~bash