Prototyped xml lib

Need better node.js env check (or just specify it explicitly)
Sample travis file
Fixed JSHint and updated xml.js and test/docs
updated package.json
Merge branch 'dmitry-xml'
Merge branch 'matt'
Merge branch 'master' of https://github.com/amida-tech/blue-button
re-organize fixtures
Merge branch 'master' into matt
Initial theft of jmandel's files.