setup issues on Red Hat Enterprise Linux 6

[emacs18]

At least python 3.5 is needed. Python 3.4 failed to install pyqt5. So I
had to create virtual environment for python 3.5 on my anaconda
installation.

On RH 6, dbus-daemon is not launched by default. So I had to add the
following bash starupt script:

if [ -z $DBUS_SESSION_BUS_ADDRESS ]; then
    eval `dbus-launch`
    export DBUS_SESSION_BUS_ADDRESS
fi

On RH 6, libc.so version is 2.12, but at least 2.14 is needed.
For now I use RH 7 as a work around.

I thought I would share this information in case you want to update your setup instruction.

[manateelazycat]

RedHat's library is too old for launch DBus and Qt