Issue #2312093 by alexpott, yched, andypost, swentel | xjm: Rename FieldInstanceConfig to FieldConfig.

Issue #2254153 by crowdcg, davidhernandez, joelpittet, mortendk, mdrummond, cilefen, LewisNyman: Move node classes out of preprocess and into templates.

Issue #2226493 by Berdir, Wim Leers, m1r1k, mr.baileys, andypost, scor, cbr, joelpittet: Apply formatters and widgets to Node base fields.

Issue #2004252 by mortendk, babruix, dasjo, joelpittet, visabhishek, cwells, jenlampton, Dragan Eror, nikhiltri, minneapolisdan, Manuel Garcia, sarahjean, acouch | scor: Node.html.twig template.

Issue #1912536 by vollepeer, derheap | taslett: Remove all references to the (removed) user-picture.html.twig file.

Issue #2227869 by joelpittet: Remove magic printing from Attribute class to make Twig 'without' filter work for attributes.

Issue #2226185 by galooph, filijonka, Cottser: Remove @ingroup themeable from core theme Twig template docblocks.

Issue #2114563 by joelpittet, martin107, Cottser: Remove TwigReference with the help of 'without' filter replacing 'show'/'hide' functions.

Issue #731724 by larowlan, andypost, dixon_, tsvenson: Convert comment settings into a field to make them work with CMI and non-node entities.

Issue #2013094 by pwieck, Cottser: Remove unnecessary template_preprocess() reference from all Twig files

Issue #1938840 by chrisjlee, duellj, Cottser, shanethehat, idflood, tlattimore: Bartik.theme - Convert PHPTemplate templates to Twig.

Issue #1898432 by WebDevDude, steveoliver, vlad.dancer, jenlampton, pixelmord, Fabianx, iztok, EVIIILJ, jwilson3, c4rl, Cottser: Convert node module to Twig.

Issue #1696786 by Fabianx, jenlampton, stevector, steveoliver, jwilson3, amateescu, chx: Integrate Twig into core: Implementation issue.