Update URLs pointing to Google Code to use GitHub.

While here, update a couple of dates in manpages.

(cherry picked from commit 70e4b713b7e4675e871eb8ebefe69d42bb57998a)
Signed-off-by: Bruce A. Mah <bmah@es.net>
Try to make make_release work for git.  "tar" works, "tag" might.

(cherry picked from commit c897d7368ae3f4b9ad94a572a23bda378233a136)
Signed-off-by: Bruce A. Mah <bmah@es.net>
Minor tweaks to README.

(cherry picked from commit f274eea090d443d09bdc198e6a81390baca25d84)
Signed-off-by: Bruce A. Mah <bmah@es.net>
Reorganize the README, and try to format it so it looks better when
it's displayed on the iperf page on GitHub.

I wish there was a way to preview this change before pushing it.

(cherry picked from commit 396ccaf45c031dfff9fb4cf3278b00e65845a411)
Signed-off-by: Bruce A. Mah <bmah@es.net>
See if we can get GitHub to properly parse markdown if the README file
has the right extension.

(cherry picked from commit 0f72a12069063b0a1a342ee271035760a84db21d)
Signed-off-by: Bruce A. Mah <bmah@es.net>
Point downloads to a directory, not a single file.

(cherry picked from commit 34a759654596bf7974bdf404f1e2475466e36d76)
Signed-off-by: Bruce A. Mah <bmah@es.net>
Three-clause BSD license, not two-clause.  Also tweak more README text.

(cherry picked from commit 2be606a503abc5898cf0c34becdd2c8217a00d7f)
Signed-off-by: Bruce A. Mah <bmah@es.net>