NLSR version 0.4.3

Changes:

• breaking change Change NLSR to nlsr for various prefixes (issue #4543)

Bug Fixes:

• Fix dry-run mode not working (issue #4394)

• Fix convergence w/o content store (issue #4430)

• Register router prefix to fix remote requests (issue #4543)

• Fix build with clang-5.0 (issue #4547)

• Avoid misaligned memory access (issue #4609)