Added simple file API

Fortia.fileRead(path string) data string
 - Returns the content of the file located at path
Fortia.fileWrite(path, data string)
 - Writes data to path, if path does not exists create the file.
Fortia.fileExists(path string) exists bool
 - Returns wether something exists at path or not
Fortia.fileCreateDir(path string)
 - Creates directory at path (creates multiple directories if it needs to)

Also moved the following functions:
 - _fortiaSendUsrMessage -> Fortia._sendUsrMessage
 - _fortiaGetPlayers -> Fortia._getPlayers
 - _loginfo -> console.log
 - _logdebug -> console.debug
 - _logerror -> console.error