Specs for the do-nothing case.
More do-nothing cases.
Test for a single decoration.
Decorate matching Editor lines.
Decorate each Editor as it's opened.
Now with one fewer debugging line.
Decorate the gutter, too.
Derive the stackframe color from the syntax theme.
Re-mark everything when the active trace changes.
Merge pull request #5 from smashwilson/decorate-frame

Decorate lines within Editors that correspond to the active Stacktrace.