fix for issue #116
fix for issue #116

'frontier at a glance' page is almost identical to 'Quick start single process'. So just changed that link. You can compare the following links and see for yourself.
http://frontera.readthedocs.org/en/latest/topics/quick-start-single.html
http://frontera.readthedocs.org/en/v0.3.0/topics/frontier-at-a-glance.html (found only v0.3.0 docs)
TeamHG-Memex/frontera