Release checklist git trivia
Merge branch 'release-checklist-trivia'
Ditz issue update
Change DITZ_RELEASE for v1.0
Merge branch 'fix-ditz-release'
Ditz issue update
Release checklist: DITZ_RELEASE update
Add "make issues" for issues of next release
Merge branch 'release-checklist-trivia'
Convert feature options to internal RST doc
Move special environment option suggestions to RST
Guide compiling section, RST for special topics
Low memory RST formatting trivia
Feature options overview improvements
Refer to feature-options.rst for full options
Remove non-common feature options from guide

These are now covered by the internal RST doc.
Remove a few more rare-ish options

Also rewrite the "special environments" sections to be a bullet list, because
there will be separate RST files for each.
Markup fix, note on feature option deletion
Layout fix
Feature options overview and naming