Prepare for customizing eval environment
Large refactoring, many node transformations added
Work on node-transformers, writing tests
Refactor element transformers, add more tests
Node transformers and tests
Make xf:text() null-safe
Add xquery wikibooks transformer example, faster version of ny-times example
Add environment tests
Add environment tests
Faster ny-times example
Add ny-times stats
New examples
Fix tests
Add extra xf:select and xf:select-all arity
Oops
Rename example file
Working version of extract
Refactoring of xf:at and xf:extract
Refactored xf:do, xf:do-each and xf:transform, fixed tests
Fix bug in xf:extract