Initial commit
1st draft. text/binary protocol ready.
1.DesignDoc CRUD.
2.View query.
3.Rename Client to MemcachedClient.
4.Add CouchClient.
Support connect to a cluster.
1. Split couchclient into couchclient(for couchbase) and memcached-client(for memcached).
2. cleanup codes a bit.
Merge branch 'master' of github.com:rikulo/couchclient

Conflicts:
	README.md
Add LICENSE, NOTICE, CHANGES files.
Refactor the file structure
Update usage in README.md
Update description in README.md.
fine tune dependency in pubspec.yaml