Fix typos.
0x7df in hex is 2015 in decimal.
Merge pull request #247 from openxc/typos

Fix typos.
Remove old hipchat notification token.
Require an explicit PLATFORM to be set when running Make.

Since the 'make clean' goal was changed to only clean the current
platform, I've had the problem a few times where I'm explicitly setting
the PLATFORM=X when I compile, but not when I clean. It ends up cleaning
the wrong thing, and the firmware isn't rebuilt properly.

This would/will be less of an issue when
https://github.com/openxc/vi-firmware/issues/231 is resolved.
Split up the compile tests into long/short versions.

The long tests are really thorough but we don't need to run them every
time, and it makes running the full compilation step locally kind of
annoying.
Merge remote-tracking branch 'origin/master' into next