Issue #1909418 by tim.plunkett, damiankloip, larowlan, dawehner, kim.pepper: Allow Entity Controllers to have their dependencies injected.

Issue #1739986 by RobLoach, pwolanin, sun, moshe weitzman, andypost: Fix fallback in drupal_get_hash_salt(), move it to bootstrap.inc, use instead of ['drupal_hash_salt()'].

Issue #1764474 by Berdir, chx, alexpott, pounard, msonnabaum: Make Cache interface and backends use the DIC.

Issue #1496480 by mrf, disasm, kbasarab, pfrenssen, cam8001, typhonius, Letharion, ACF, vijaycs85, heyrocker, Berdir, alexpott: Convert file system settings to the new configuration system.

Issue #1792536 by chx, Berdir, sun, David_Rothstein: Remove the install backend and stop catching exceptions in the default database cache backend.

Issue #1849700 by katbailey, effulgentsia: Fixed DrupalKernel's container.modules param should contain module filenames, not full namespace paths.

Revert "Revert the revert of Issue #1849004 by chx, xjm: One Service Container To Rule Them All. It was innocent after all."

This reverts commit a1638b87.

This reverts commit 761ac679.

Issue #1706064 by chx, katbailey, effulgentsia, podarok et al: Compile the Injection Container to disk.