Merge pull request #1 from densh/master

Implement Liftable[xml.Node] and Unliftable[xml.Node]
Expression => Unquote
removes an extraneous import
u => __universe
Merge pull request #2 from xeno-by/master

minor fixups
travis build & publishing support
Merge pull request #3 from xeno-by/master

travis build & publishing support
these are the right credentials
Implement namespace binding lifting