- added new driver for APEX OSA, which use TCP sockets directly, refactored from the Prologix controller (PR 8)
- refactored NI_PCI_6723's driver, and added the the example labview programs that go with it (PR 9)
- minimum current to 1nA in keithleys, down from 1uA (minor change 8b1527b)
- bugfix in keithley: not sourcing negative currents correctly (bugfix 2268980)