create export logs function, will allow user to export to a tab delimited file the selected columns for multiple logs
clean up dialog:=
clean code
Merge pull request #445 from eschuhmacher/logbook

#441 add logic and dialog to export logs to a tab delimited file
org.epics.graphene: update to current SNAPSHOT
o.c.u.pvmanager.graphene: update to current SNAPSHOT
org.epics.graphene: update to current SNAPSHOT
o.c.u.pvmanager.sim: update to current SNAPSHOT
org.epics.vtype: update to current SNAPSHOT
o.c.u.pvmanager.graphene: update to current SNAPSHOT
org.csstudio.graphene: adding intensity graph widget
o.c.u.pvmanager.graphene: update to current SNAPSHOT
o.c.u.pvmanager.jca: update to current SNAPSHOT
o.c.u.pvmanager.graphene: update to current SNAPSHOT
org.epics.graphene: update to current SNAPSHOT
o.c.u.pvmanager.graphene: update to current SNAPSHOT
org.csstudio.graphene.opiwidgets: adding intensity graph BOY widget
org.csstudio.graphene: adding icons
org.epics.graphene: update to current SNAPSHOT
o.c.u.pvmanager.graphene: update to current SNAPSHOT