message: added gcc-c++ for RHEL OS dependencies
diff: @@ -31,7 +31,7 @@ For **Fedora** and **RHEL-derivatives**, the following command will ensure
  that the required dependencies are installed: ::
  sudo yum upgrade python-setuptools
  - sudo yum install gcc libffi-devel python-devel python-pip python-wheel openssl-devel libsasl2-devel openldap-devel
  + sudo yum install gcc gcc-c++ libffi-devel python-devel python-pip python-wheel openssl-devel libsasl2-devel openldap-devel
  **OSX**, system python is not recommended. brew's python also ships with pip ::
  