Disable External hack for CAS

This doesn't seem to be very stable for now.

Change-Id: Iaaaaeaa5de0b5149aeedf416606f48942b21e4fc
Some more fixes to 'lib/couchbase.js'

Change-Id: Ic739f9636e8bb03efbd1f137711c31bddd75dcc8
Make CAS diplay shorted

Use a two-element in array rather than an 8 element byte array

Change-Id: Ia3f46dfdf19ca6a67074a5688a2b1cd5ad579079
Make exception display more normalized

Apparently node will dump the "object" exception, so we don't have to
have an ugly string do this for us.

Change-Id: I0cccfc76e8aea5d0dbcbc03dc4268b06c962ac03
Fixup some tests

Provide a new harness.js module which is based off the old one but
provides some functionality to cut out the boilerplate.

Also, fix up the basic "set" and "get" tests. Note the 'get' test still
fails because we don't have JSON support yet.

Change-Id: I55eb9750a9f89477e95d5d62fe52bf53ebce771f