v0.0.3

• Add provenance information to stack trace entries
• Separate Object from Any
• Object addition: { foo: 42 } + { bar: 100 }
• Object field subtraction: { foo: 42 } - "foo"
• Fix bugs in os.up and git.clone
• Improve Ctrl-Space invocation assistance
• Add compound assignment operators: +=, -=, *=, /=
• Remember the most recent incomplete command as the last entry in history
• Add a globals object, prevent infinite loops when toStringing cycles
• Add Any.isA method