templates: Remove social auth plugins code from login and register templates.

login: Remove social auth code from login controller. This code will be moved to the EE edition.

auth: Remove AuthomaticBase class. - Code will be moved to the EE version.

pyramid: Fix problem with adding '_' to renderer globals. - Problem occures only when executing pyramid views.

authn: Fix error in call to logger.

version: bumped from 4.0.1 to 4.0.2

merge: merge back stable into default

Added tag v4.0.1 for changeset 170c5398320e

merge: merged default into stable

docs: added 4.0.1 release notes