Use function to do TLV encoding for DHCP.
psychomario/PyPXE#26
Parse DHCP options on received packets. Starting to use them.
resolves psychomario/PyPXE#26
Merge pull request #30 from ibobbitt/dhcp-tlv

Better DHCP TLV handling
Merge pull request #31 from mmattioli/master

Documentation Improvements
Merge pull request #16 from psychomario/master

update from original