NLSR version 0.5.1

Changes

• Set best-route strategy for certificate prefixes (issue #4881)

• Use ndn-cxx InMemoryStorage for LsaSegmentStorage (issue #4788)

• Switch from ndn::EventId to ndn::scheduler::EventId (issue #4883)

• Add FreshnessPeriod where MustBeFresh is used (issue #4913)

Bug Fixes

• Fix canonization by resetting io service after each neighbor (issue #4872)

• Disable network interest in while fetching NLSR certificate (issue #4879)