Improvements to the create and help commands

- help now lists all commands again (forgot watch und unwatch in last
commit)
- help (command) now works with the alternative shortcuts of the
commands
- help (command) now explains the different brackets
- help (command) now includes the shortcut of a command
- create now supports the creation of FlxObject which require parameters
for their constructor
Documentation and credits for Console.hx
Merge pull request #366 from Gama11/dev_console

Improvements to the create and help commands