v0.15.0

Commit	Message/Description
5406895	v0.15.0
13147ee	Servo: removes blank line whitespace
fd49e3b	Update example template copyright years
c33155e	Add support for multi-turn, winch, 90 and 360 degree servos
a8b12e0	DRV8871 Example
cb9d4d9	Compass: fix typo in test file
42458a1	.npmignore: lib/datasheets.md
16c1cdd	All: move datasheet urls to lib/datasheets.md
b43662d	Package.json: remove "engines"
641f917	Compass: don't make assertions for 144004 possible compass directions.
01c97ad	Lint: fix lint issues
9f826d5	CI: Make Travis and Appveyor run the same test commands. Fixes gh-1462
6402aa9	Coverage: Barometer, Board, Compass, IMU, Orientation