v2.4.2

• the equals key is now the default trigger that starts the calculator instead of the grave/backtick key
• the default key can now be changed to another key such as #, [ or the grave/backtick key
• if trigger_key is left blank then the calculator will start when any of the number keys are pressed
• the number pad enter key can be used to send both the trigger key and endkey
  • if the trigger key is left blank then the number pad enter key will still send 'enter' when the calculator is off