add note on unpacking the 0.4 release.
add note on unpacking the 0.4 release.

rnewson/couchdb-lucene,eHealthAfrica/couchdb-lucene,rnewson/couchdb-lucene,ehealthafrica-ci/couchdb-lucene,eHealthAfrica/couchdb-lucene,ehealthafrica-ci/couchdb-lucene,ehealthafrica-ci/couchdb-lucene,rnewson/couchdb-lucene,eHealthAfrica/couchdb-lucene