NLSR version 0.6.0

Improvements and bug fixes

• (breaking change) Major changes in the TLV structure and classes. Reduced codebase size and improved compilation times. LSA de/serialize functions are replaced by wireEncode/Decode. Updated LSA wire formats and TLV assignments. Updated nlsrc to print using the new encoding. (issue #4787, issue #5116)

• LSDB refactor: switch to boost::multi_index to replace 3 LSA lists (issue #4127)

• Fix wrong reaction on hello Interest timeout (issue #5139)