Move from users to voice-users

...n-html5/imports/api/2.0/users/server/modifiers/addUser.js

...tml5/imports/api/2.0/users/server/modifiers/removeUser.js

...imports/api/2.0/users/server/modifiers/updateVoiceUser.js

bigbluebutton-html5/imports/api/2.0/voice-user/index.js

...-html5/imports/api/2.0/voice-user/server/eventHandlers.js

...ports/api/2.0/voice-user/server/handlers/joinVoiceUser.js

...ports/api/2.0/voice-user/server/handlers/leftVoiceUser.js

...orts/api/2.0/voice-user/server/handlers/mutedVoiceUser.js

...ts/api/2.0/voice-user/server/handlers/talkingVoiceUser.js

...uebutton-html5/imports/api/2.0/voice-user/server/index.js

...ports/api/2.0/voice-user/server/modifiers/addVoiceUser.js

...ts/api/2.0/voice-user/server/modifiers/removeVoiceUser.js

...ts/api/2.0/voice-user/server/modifiers/updateVoiceUser.js

...ton-html5/imports/api/2.0/voice-user/server/publishers.js

...orts/api/2.0/voice-users/server/modifiers/addVoiceUser.js

...s/api/2.0/voice-users/server/modifiers/removeVoiceUser.js

...s/api/2.0/voice-users/server/modifiers/updateVoiceUser.js

...on-html5/imports/api/2.0/voice-users/server/publishers.js

bigbluebutton-html5/imports/startup/client/base.jsx

...ports/ui/components/actions-bar/mute-button/container.jsx