[ndnSIM] ndnSIM 2.7 released

[Alex Afanasyev]

We are pleased to announce the release of ndnSIM version 2.7.

The new version includes the updated submodules of NFD and ndn-cxx
(both based on 0.6.5).  The base version of NS-3 simulator has also
been recently upgraded version 3.29 (to upgrade, you may need to
re-clone base NS-3 repository, checkout, or hard reset to ndnSIM-v2.7
branch).

For more details about the release, refer to
https://ndnsim.net/2.7/RELEASE_NOTES.html

Source code, updated instruction how to install how to compile ndnSIM
(note that there is a different set of dependencies if you are
planning to use NS-3 visualizer), tutorials, FAQs, and other useful
resources are available on official ndnSIM website:
https://ndnsim.net/2.7/.

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ndnSIM Team