Issue #2459819 by Wim Leers, rteijeiro: Remove CacheableInterface (and no longer let block plugins implement it)

Issue #2444231 by Wim Leers, nlisgo: Fix CacheableInterface so it makes sense (was: "Make Config objects & Entities implement CacheableInterface + add BubbleableMetadata::createFromCacheableObject()")

Issue #1897058 by disasm, rteijeiro: Replace "boolean" with "bool" when used as param/return/var type

Issue #2453761 by Gábor Hojtsy: Views numeric formatter's plural formatting setting incompatible with many languages

Issue #2459971 by Gábor Hojtsy: The langcode key on configuration files is not explicit in configuration schema

Issue #2457887 by prateekMehta, stefan.r, rpayanm, alexpott: Use Utility\SafeMarkup class instead of Utility\String for placeholder(), checkPlain(),format() functions

Issue #1847596 by amateescu, amitaibu, YesCT, Berdir, David_Rothstein, xjm, rteijeiro, ParisLiakos, webchick, Wim Leers, yched, jhodgdon, Bojhan: Remove Taxonomy term reference field in favor of Entity reference

Issue #2090115 by alexpott, xjm: Don't install a module when its default configuration has unmet dependencies

Issue #2433599 by Wim Leers: Ensure every (non-views) pager automatically associates a matching cache context

Issue #2322639 by hussainweb, LinL, Temoor, oenie, MKorostoff, mglaman, kyuubi, unstatu, omers, pcambra, legolasbo, benjy, JeroenT: Replace all instances of node_type_load(), node_type_get_types(), entity_load('node_type') and entity_load_multiple('node_type') with static method calls from DRUPAL SOUTH WOOOO!

Issue #2434745 by geertvd: Boolean field: On/Off labels are in the "storage" settings but shouldn't be

Issue #2407765 by Wim Leers, borisson_: Wherever simple config is used to render output to end user, associate their cache tags

Issue #2435493 by effulgentsia: Change String::format()'s '@' and '%' placeholders to be auto-escaped rather than always-escaped

Issue #2349683 by davidhernandez, mortendk, Manuel Garcia, emma.maria, DickJohnson: Copy forum templates to Classy

Issue #2394883 by Gábor Hojtsy, plach, jhodgdon: Language setup for entity and field based rendering in views is independent, confusing UI, lacking test coverage

Issue #1959806 by amateescu, jibran, goldorak, Wim Leers, yched, dawehner: Provide a generic 'entity_autocomplete' Form API element

Issue #2358079 by pwolanin, Berdir: Require a specific placeholder format in db_query() in order to trigger argument expansion, and require explicit 'IN' parameter for conditions

Issue #2306407 by lauriii, penyaskito, mortendk, pakmanlh, Wim Leers, ypogue: Remove breadcrumb from page template

Issue #2094499 by amateescu: Convert "Manage (form) display" forms to be the official entity edit forms for EntityView[Form]Display objects

Issue #2140511 by alexpott, Gábor Hojtsy, swentel, babruix, ohthehugemanatee, jessebeach, Berdir: Configuration file name collisions silently ignored for default configuration

Issue #2392319 by alexpott, effulgentsia: Config objects (but not config entities) should by default be immutable

Issue #2281645 by dawehner, andypost: Make entity annotations use link templates instead of route names

Issue #2322105 by rpayanm, prics, Upchuk, Temoor, seanB, pcambra, jamesdixon: Replace all instances of taxonomy_vocabulary_load(), taxonomy_vocabulary_load_multiple(), entity_load('taxonomy_vocabulary') and entity_load_multiple('taxonomy_vocabulary') with static method calls

Issue #2309737 by rpayanm, hussainweb, max-kuzomko, herom, millerbennett, ianthomas_uk, quietone, Sutharsan, sumitmadan, toddmbloom: Remove deprecated format_plural usage

Issue #2030669 by daffie, Sharique, rpayanm, Mile23, undertext, marcingy, martin107, filijonka, amitgoyal, msupko: Expand Vocabulary with methods

Issue #2395395 by alexpott, effulgentsia, Gábor Hojtsy: TestBase lacks a config method to be used consistently in tests

Issue #2350309 by droplet, larowlan: Forum index links head to taxonomy/term/{term} instead of forum/{term}

Revert "git commit -m 'Issue #2350309 by droplet, larowlan: Forum index links head to taxonomy/term/{term} instead of forum/{term}'"

Sigh. Only a matter of time before I screwed up a commit with the new UI. ;)

This reverts commit bb21cc22.