better memoization (needs make)
handle CRLF better, starting to count lines -- prep for source map
fixed order of let-assignments
better fix for let assign order
checkpoint: switching to using SourceNode
checkpoint: switching to using SourceNode
Merge branch 'master' of git@github.com:zot/Leisure.git into roy

Conflicts:
	core/ast.coffee
	core/simpleParse.lsr