Add a predicate method for LLDP frame. See #252.
Fixes undefined method `prerelease?' error.
Merge branch 'develop' of https://github.com/trema/trema into develop
Add FeaturesReply#physical_ports iterator.
Version bump to 0.3.13
Merge branch 'release0.3.13' into develop
Add alias PortStatus#phy_port -> port
Delete unecessary empty lines (closes #252).
Use rubygems.org as a gem source.
Version bump to 0.3.14
Merge branch 'release0.3.14' into develop