Fix bug in !read-file
Add !read-line
Add !run-blob
Start runtime even without a filename
Rename save_scopes to traceback and make it global
Minor adjustments to (sort)
Add print-traceback
Add (list-globals)
Add rudimentary REPL
Add get-from support for blobs
Add set-to support for blobs
Add @dict!method syntax

Same as dict!method, except it doesn't invoke call
Add escape sequences for literal strings

\\, \t, \n, \r, \q (") and \{123} (decimal ordinal escape sequence)