added vlan code from inetmanet - 2996f0d703dc47b54d6262ae18b60f7a9e3e9757
vlan examples from inetmanet
vlan changes on existing codes from inetmanet
vlan examples:  fixed test scripts and made to executable
vlan: removed displayString from ethernet frames
ethernet: added EtherFrame.h
vlan/ethernet: added fields to Ethernet1QTag