0.7.1

A maintenance release

When our rendering code throws for some reason, you should see related exception message in the console with a proper stack trace. I have also updated some styles.

Also there is a new helper function available in the toolbox: devtools.toolbox/force-format

Notable commits:

58ac191 wrap api calls with our own exception guard
62dddce make custom formatters more robust in face of "weird" inputs
081593c introduce toolbox/force-format (close #17)
49b9023 introduce more tweakable prefs for toolbox/envelope
6648487 implement present-function-name and related functionality
3a9eaeb improve warning about custom formatters not rendering (close #18)

All new work: v0.7.0...v0.7.1