Project.clj housekeeping, bump some server versions
Housekeeping: embedded servers
Tune embedded server config for new tests with greater concurrency
Temporarily removing misleading results

This reverts commit 5fd6ec249851dd9ab08e32f590929a9a2f3cced8.

The hardware being tested here is substantial: a 2x6 core CPU (24 threads).

There's value in testing a wide range of hardware, but server configs should
please be adjusted by testers to something reasonable for the hardware being
tested.

At least Immutant, nginx, Http-kit, Jetty are configured here for no more than a
couple cores - making the test results completely misleading.

I'd happily take a pull-request that re-ran the benchmarks on the same hardware
once all the server configs have been adjusted for this kind of environment.

Thanks!

- Peter Taoussanis (ptaoussanis at taoensso.com)
Merge branch 'housekeeping'
README: Update submission guidelines
Misc housekeeping, incl. dropping ring-netty server
Remove :ring-simple from tests (no longer maintained)
nginx config: use `auto` work_processes
8 io/worker threaads seem to be optimal for 24-thread environment
Merge branch 'master' into new-aleph

Conflicts:
	README.md
	servers/embedded/project.clj
	servers/embedded/src/servers.clj
	servers/nginx-clojure/conf/nginx.conf
	servers/nginx-php/conf/nginx.conf
	servers/nginx.conf