[WIP] Dynamic configuration framework#385

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375gnu wants to merge 11 commits intoCelestiaProject:masterfrom

375gnu:config-wip

Commits on Jul 30, 2019

wip
375gnu
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wip
375gnu
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Commits on Aug 30, 2019

wip
375gnu
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Commits on Sep 2, 2019

wip
375gnu
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Revert parser changes
375gnu
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Commits on Sep 3, 2019

Commits on Sep 8, 2019

rewrite using watcher/watchable (broken, no override for virtual fn)
375gnu
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Commits on Sep 9, 2019

Revert "rewrite using watcher/watchable (broken, no override for virtual fn)"
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