Give remedial suggestion for hostapd bug

Hostapd v2 introduces a bug which currently throws the following error
and initialization fails
    nl80211: Could not configure driver mode
    nl80211 driver initialization failed.
    hostapd_free_hapd_data: Interface wlp3s0ap wasn't started

More Info: https://bugs.launchpad.net/ubuntu/+source/wpa/+bug/1289047

Give a suggestive message to the user when hostapd fails because of the
above bug outlining the workaround mentioned in the above bug report.
Check version of NetworkManager

* Check the version of Network Manager and accordingly issue commands
as nmcli >= 0.9.10 is not backwards compatible
* Also, check if NetworkManager is running before issuing related
suggestions
Merge branch 'hashken-hostapd_bug'