Put the sphinx-generated docs/Makefile under revision control like it
should have been from the start (requires some changes and fixes
to .gitignore).
Change project name from iperf to iperf3 in a few generated places in
the documentation pages, most notably the page headers.
Use --disable-static or --disable-shared to build only one flavor
of libraries.
Tested on MacOS, FreeBSD, and CentOS 6 Linux.
Resolves#146.
Originally submitted by: @i2aaron