Changes tests to use node-tape instead of whiskey
Adds coverage with istanbul
Removes 'scripts' dir
Adds some messages to asserts
Tiny niceness fixes
Adds 'clean' target to node-gyp zookeeper

TODO: when this project reaches node >= 0.10.0 use faucet for test
output
Merge pull request #8 from rackerlabs/rch/add-istanbul-coverage-with-tape

Add coverage with tape tests rather than whiskey