Pass generation query param to boto.gs.Key.open_read()
Add new CloudSearch regions. Closes #1465.
Added a failing testcase for trailing path slashes in SigV4.
Preserve trailing / when canonicalizing URI path for signature V4
Merge pull request #1543 from onyxfish/develop

Add new CloudSearch regions. Closes #1465.
Revert "Preserve trailing / when canonicalizing URI path for signature V4"

This reverts commit dec541f7e56506342394e466fa6e9d9805dd77fb.
Safely re-introduced the change from SHA: dec541.