Fix function comments based on best practices from Effective Go (#145)

GoLint and GoVet warnings (#143)

Add go.mod file (#142)

Add optional connection handler (#141)

Introduce multi-routine runner (#140)

Add Data field to Packet Out. (#139)

Allow any address family in net_test (#137)

Add data field to the Packet-In message. (#136)

Add server concurrency model (#135)

Instructions' Actions not Available after Reading (#133)

Stop readTablePropXM() from Attempting to Read XM Payloads (#131)

Added String() Methods to Assist with Debugging (#132)

Fixed issue where padLen() was computed twice, leading to an incorrect pad length. (#129)

Match XM Parsing - Type & Length Ignored (#127)

Update Travis CI testing (#128)