Support for command history

[mvysny]

Hi! Pressing the up arrow could look up the last command from the history (or the last line returned via the LineEvent and could auto-fill the command/line for you into the console. Then, by pressing ENTER, the same line would be sent in the LineEvent.

There is no need for history matching (e.g. pressing pg_up/pg_down would only find commands starting with already written input).

[javier-godoy]

Support for pgUp and pgDown will be included in this feature.