Changes since the last release

• gitstatus
  • Don't show instant prompt if gitstatus is likely to download gitstatusd.
  • Verify sha256 of downloaded gitstatusd binaries.
  • Add a mirror on gitee.com for faster download from China.
  • Display progress when downloading gitstatusd. Interrupt instant prompt if necessary.
  • Do not apply timeout from gitstatus_start -t to the downloading of gitstatusd.
  • Revert gitstatus_start timeout back to 5 seconds.

Message for @shibumi: https://github.com/romkatv/libgit2/archive/tag-005f77dca6dbe8788e55139fa1199fc94cc04f9a.tar.gz