Add Length <: Node
Use Length instead of Isa(arg,NTuple) for tuple patterns
Rename TupRef --> Ref
Add Array pattern
Add workarounds to that typeseq != isequal for Intension comparison
Add test for vector patterns
Document Vector patterns. Closes #5
Update readme
Update readme
Remove unused exports
Some whitespace adjustments
Add Atom{T} <: Node{T}, replace Never and Always with it
Add users dict to Intension
Some fixes to make Atom work
Generalize rev_bindings to hold multiple names for a node
Make show(::Pattern) use users from Intension