Add two commands to shell: delete n (which garbage collects AST n) and gc (which garbage collects all ASTs except for the current and initial ASTs)
On second thought, rename 'delete' to 'gc'
Add quoted srcname syntax to parser.
Make deleteS in ScopedKernel garbage collect in underlying Kernel.
Added "reorder-lets" command.
Merge branch 'master' of github.com:ku-fpg/hermit
Renaming Talk directories.