added Checkbox class

- computer/APIs/checkbox
* added

- computer/APIs/Window
* removed some redundant code

- computer/startup
* now loads checkbox API

- turtle/startup
* removed redundant spaces
updated ctrt (turtles now remote controlable)

- computer/APIs/Socket
* timeout is now set as member variable

- computer/bin/ctrt
* added remote control ability

- turtle/APIs/trt
* added turtle wrapper API

- turtle/startup
* trt-API is now loaded
* fixed some bugs