tweak neomutt build

add POD highlighting for shell

Tweak perl settings, move all into after-syntax file

add autofmt toggle

rename

mv .mutt/build-neomutt bin/setup-neomutt

remove hgflow

add .hgext/

add bin/setup-hg-evolve

remove mq and flow, unused

Fix up navigation

add tigrc

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mercurial