Particle Electron support

Hello everyone,

there is a couple of fresh packages in the zpm:

  • board.zerynth.particle_electron: everything needed to add Particle Electron support to the IDE
  • vm.zerynth.particle_electron: the standard VM for the Electron
  • core.zerynth.stdlib (r1.0.8): new standard library with gsm support
  • lib.ublox.g350: a library to use the 2G modem on board of the Electron (it should also work with the u260 model…)