Merge branch 'master' into packaging

* master: (31 commits)
  packaging: add Sparkle compilation
  sparkle: bump sparkle version
  autoupdate: add Sparkle framework
  preferences: always hide general stun/turn server
  animations: fix glitch after animations
  chat: add sender name and interline space
  call: add connecting animation
  cleanup: remove dead code
  cleanup: run XCode code analysis
  accounts: use account selection model
  muting: add UI for audio/video muting
  contacts: fix photo rendering
  osx: add chat support
  preference: enable auto startup by default
  lrc: adapt to API changes
  preference: add autostart feature
  security: add options for SIP accounts
  macosx: fix exit segfault
  bump to 0.4.0
  cleanup: remove unused imports
  ...

Change-Id: I922a2d3c10ff229957d2a7fe1a54001c038db6bb