Move release binaries to release page

Adopting the suggestions at https://github.com/MSOpenTech/redis/issues/172
We no longer commit the binaries into the repo.
Instead, we create periodic releases on the release page.
Merge commit 'c94db2ba3849ffe2ae1b3da04bd2860a601afcd5' into release-2.8.17

Conflicts:
	bin/release/redis-2.8.17.zip
replaced // comments  #2150
Merge branch 'release-2.8.17' into 2.8

Conflicts:
	bin/release/redis-2.8.17.zip