release-1b02-1.2.1

This is a release of the Dialog compiler, standard library, and documentation.

What's Changed

• Bump version to 1b/02-dev by @dstelzer in #260
• redesign unit.dg to eliminate (list of tests $) by @susan-davis in #264
• make license text fit in 80 columns by @susan-davis in #266
• Mention change to unit.dg by @susan-davis in #271
• Update readme.txt by @susan-davis in #272
• time rate -> minutes per tick by @susan-davis in #277
• Set pred->invoked_at_line before checking it by @dstelzer in #273
• Make dgdebug respond to Ctrl-D at [more] prompt by @dstelzer in #274
• Use aamrun binary if available by @dstelzer in #278
• Make Z-machine backend align with Å-machine on inline status bars by @dstelzer in #275
• Compile large static lists in a slower but more memory-efficient way by @dstelzer in #276
• Do some cleaning up of readme files by @dstelzer in #279
• Document testing in Dialog by @susan-davis in #213
• fix wrong syntax for example by @susan-davis in #283
• Release 1b/02 and 1.2.1 by @susan-davis in #284

Full Changelog: release-1b01-1.2.0...release-1b02-1.2.1