Merge tag 'v0.2.0'

v0.2.0
Update package license to match LICENSE.md
debug: limit size of json debug messages

JSON can be very large, especially with CPU and Heap snapshots.
cluster: node v0.11 only emits message on process

See: joyent/node#7998
v0.2.1
Merge branch 'release/0.2.1' into production