Repo initialized.
Restructured project directory.
Adde some comments.
Add lwip_contrib/contrib/ports/unix/proj/lib to repo.
Some change to select_server.
Some change to run.sh and Makefile of rawt_http.
Added change made by Jianing Li.
Optimized checksum computation.
Merge branch 'master' of https://github.com/hhiker/network_algorithmics
Changed git ignore.