Use OpenStack branding for trove client

Add oslosphinx to get OpenStack branding.
Remove html_static_path since it's unused and issues a warning.
Update copyright year.

Change-Id: I0bdcab8ebc5a201a3f91b4a6c4724536d1157901
Fix universal wheel support

There's a typo in setup.cfg, it should be "universal".

Change-Id: I78992d222cf55df25db5fa94a7d8a2ffa462c5c9
Merge "Use OpenStack branding for trove client"
Merge "Fix universal wheel support"