#482346 by Berdir: Move module installation logic to module_enable() to prevent errors upon enabling modules.

- Patch #361277 by michaelfavia, Brandonian, catch, et al: remove the 'post settings' admin screen and relocate options.

- Patch #394484 by Berdir and Crell: converted node module to the new database abstraction layer. Yay.

#394508 by cwgordon7 and karschsp: Small text change to make empty content administration screen consistent with other screens.

#330983 by recidive and boombatower: Rename users/users_roles tables to user/user_role for consistency.

#371231 by JohnAlbin and EclipseGC: Rename clear-block CSS class to clearfix, which is the lingo that designers use for it.

- Patch #201122 by c960657, Moshe Weitzman: never write anonymous sessions, unless something has been written to . This is an important performance improvements -- as long as you use modules that use  carefully. It might be good to report some analytics about this in the performance settings page so administrators can see if there is a 'broken' module.

- Patch #252013 by Eaton, pwolanin, Susurrus et al: drupal_render() now printes #markup, not #value.

- Patch #245115 by kkaefer, John Morahan, JohnAlbin et al: after a long discussion we've decided to make the concatenation operator consistent with the other operators.