Merge pull request #155 from bdunne/update_fedora_setup

Ran into a missing dependency when setting up on Fedora 24

Author: carbonin

developer_setup.md

@@ -21,6 +21,7 @@
   sudo dnf -y install libxml2-devel libxslt-devel patch  # For Nokogiri Gem
   sudo dnf -y install sqlite-devel                       # For sqlite3 Gem
   sudo dnf -y install nodejs                             # For ExecJS Gem and bower
+  sudo dnf -y install gcc-c++                            # For unf gem
   sudo dnf -y install libcurl-devel                      # For Curb
   rpm -q --whatprovides npm || sudo dnf -y install npm   # For CentOS 7, Fedora 23 and older
   sudo dnf -y install openssl-devel                      # For rubygems