Diirt 2014-07 release integration

2014-07 integration include:

* epics-util 0.3.2 - http://util.diirt.org/changes-report.html#a0.3.2
* graphene 0.8.0 - http://graphene.diirt.org/changes-report.html#a0.8.0
* pvmanager 2.7.0 - http://pvmanager.diirt.org/changes-report.html#a2.7.0

I see here you removed AxisRange.absolute.  I'm getting an error on https://github.com/diirt/cs-studio-integration/blob/3.3.x/applications/plugins/org.csstudio.channel.widgets/src/org/csstudio/channel/widgets/ChannelLinePlotWidget.java#L115