Remove core patch to fix PHP 5.4 notice errors on inline entity editing

Patch https://drupal.org/comment/8314323#comment-8314323 and following comments suggest no functional bug exists, and live environment will use PHP 5.3, where this issue shouldn't occur. Local environments can switch off screen notices temporarily until issue is fixed in core

node/285
Move custom modules to custom/ folder

node/285
Move features modules to contrib/ folder

node/285