Improve .npmignore files.
Improve .npmignore files.

Change-Id: Ia4537a34210ae5b73cc581abd127fcf8c9511488
Reviewed-on: http://review.couchbase.org/55768
Reviewed-by: Mark Nunberg <dab05a0fe859c5cb93882b2a75a0d613501b07be@couchbase.com>
Tested-by: Brett Lawson <c8c4369773d7d7226e031f0c4af62e3f38a08510@gmail.com>

brett19/couchnode,couchbase/couchnode,couchbase/couchnode,brett19/couchnode,couchbase/couchnode,couchbase/couchnode,corbinu/couchnode,brett19/couchnode,corbinu/couchnode,corbinu/couchnode