STM32, Maple and Maple mini port to IDE 1.5.x

The step to integrate STM32-Arduino should be very easy, but I see two points not to do that now:

  1. UECIDE do big changes at the moment (internal structures,...), so the latest beta is still alpha. (but runs like "stable" compared like other software :wink: )
  2. We (Roger) should decide when our (his) release is "stable", I think we are at 95-98%
    When both parties are ready, we just drop majenko a little note, so he would add STM32-Arduino into the plugin manager of UECIDE. The big advantage is, that running STM32-Arduino as plugin in UECIDE it would be linked direct to github, so every change can be done within the IDE just with the "update" button.