101 under Pi IDE

Hi BillS101,
first of all, the most difficult part is getting the toolchain, which is not released for the ARM architecture.
You'll need to compile it yourself using these instructions.
Then, you need to download dfu-utils (via the RPi package manager, the 101 core and arduino101load .
After you downloaded everything, simply change the paths in "platform.txt" to match your tools location, move the core package in ~/Arduino/hardware and everything will work.
I understand it's not an easy task I wrote it down nevertheless so someone, if finds it interesting, could use this posts as a starting point to produce a user friendly package.