Improved statistics

Added more details to the statistics.

Initial release

Support for

• Conversation (chat) list
• Display of individual conversations
• Basic statistics
• Output as JSON, YAML, text

To use it, download either the binaries or install it via go install ...

Usage information can be obtained via `hermes --help``:

Hermes is a command-line interface for iMessage databases.
You can use it to analyze and display retrieveConversations and view statistics.

Usage:
  hermes [command]

Available Commands:
  check        Validate the environment
  completion   Generate the autocompletion script for the specified shell
  conversation Show retrieveConversations, find participants
  help         Help about any command
  statistics   Display message statistics

Flags:
      --config string     config file (default is $HOME/.hermes.yaml)
  -d, --database string   Full path to the chat database if it is different than the default path.
  -h, --help              help for hermes
  -o, --output string     The output format. Can be either json, yaml or text (default "text")

Use "hermes [command] --help" for more information about a command.