Custom output formatting#645

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chagris wants to merge 8 commits intodebug-js:masterfrom

Commits on Dec 12, 2018

start implementing output formatting
chagris
committed
move formatting mostly into common.js
chagris
committed

Commits on Dec 13, 2018

fix %n to correctly show namespace
chagris
committed
properly match current version's formatting
chagris
committed

Commits on Dec 14, 2018

move args handling to outputFormatters.m()
chagris
committed
implement metaformatters (color, JSON.stringify)
chagris
committed
add `%d` `outputFormatter` to show exact ms diff
chagris
committed
fix most issues from the linter
chagris
committed