Changes in env setup and quickstart documentation | fixes loomio#4201

docs/en/development_handbook/setup_environment.md

@@ -28,9 +28,9 @@ You will need PostgreSQL 9.4+ for the `jsonb` data type.
 
 ```
 $ sudo apt-get update
-$ sudo apt-get install git-core postgresql-9.4 postgresql-contrib-9.4 build-essential \
+$ sudo apt-get install git-core postgresql-9.6 postgresql-contrib-9.6 build-essential \
                        libssl-dev libpq-dev libffi-dev libmagickwand-dev \
-                       libreadline-gplv2-dev nodejs imagemagick wget
+                       libreadline-gplv2-dev nodejs imagemagick wget libsqlite3-dev
 ```
 
 ## Install Ruby with rbenv
@@ -41,7 +41,7 @@ From here onwards the instructions apply to both OSX and Linux.
 
 I recommend that you don't use managed (Homebrew, APT etc) versions of ruby, rbenv and ruby-build. They're no easier to use, and they tend to be out of date just when you need the latest version.
 
-First we install [rbenv](https://github.com/sstephenson/rbenv). (Replace ~/.bash_profile with  ~/.zshrc, ~/.profile, or ~/.bashrc depending on what filename you use).
+First we install [rbenv](https://github.com/sstephenson/rbenv). (Replace ```~/.bash_profile``` with  ```~/.zshrc```, ```~/.profile```, or ```~/.bashrc``` depending on what filename you use).
 
 ```
 $ git clone https://github.com/sstephenson/rbenv.git ~/.rbenv
@@ -82,7 +82,7 @@ At the time of writing 2.3.0 is the latest version.
 $ rbenv install 2.3.0
 $ rbenv global 2.3.0
 $ gem install bundler
-$ rbenv rehash
+$ bundle install
 ```
 
 ## Install Node.js