Pre-release 0.10.0-alpha.2

Added

• Added jcli commands to support private voting workflows under votes subcommand.
• Handle the SIGTERM signal on Unix.

Changed

• Rearranged jcli subcommand trees under certificate and votes subcommands, shortened command names, improved help descriptions.
• Use bech32 format for all private or public keys in jcli.
• Expose the total number of votes in vote plan status in REST api and remove the votes array.