added 2 extra methods to FTDevice (isOpen and isHighSpeed)
Exposed native method for using a custom VID and PID in Linux and Mac OSX
Merge branch 'ver-0.2.6' of https://github.com/e-d/JavaFTD2XX into ver-0.2.6

Conflicts:
	nbproject/project.properties
Merge branch 'ver-0.2.6'