Use hw_mainline even if no CapeMgr

Merge pull request jadonk#10 from jadonk/master

Fix node v4.x build issues on travis-ci

PWM improvements (jadonk#141)

* Add addresses and references for eCAP PWM devices.

* Handle some cases for PWM.

* Fix syntax error - add comma

Re-enable support for older kernels

hw_mainline.js: trim null characters in board name

Update package.json

minor change to add socket.io object return

Update hw_mainline.js

Used the wrong device-tree entry. Just that kind of day. :-(

server.js: serve $dir/static as /bone101/static

This allows avoiding Jekyll duplicating the static folder.