#200069 by keith.smith: new standard for 'more information' links in module help texts, as the handbook we referred to before was renamed

#154064 by pwolanin: get hook_help() up to speed to menu changes, allowing router path based lookups, and also full path argument lookup with a passed argument array

- Patch #67893 by kbahey, dww, alienbrain, asimmonds et al: made it possible to filter log messages in the database log.

- Patch #63881 by kbahey and jakeg: improved Drupal's logging functionality.  Added support for external loggers, and included a small syslog module into core.

- Patch #34755 by chx et al: faster menu system.  HEAD is temporary broken and there is no upgrade path yet.

#100516: CSS preprocessor to cache and compress all .css files. Benchmarks show up to 40% faster page loads.

- Patch #92992 by webchick and neclimdul: clean up documentation that is superseded by the new 'by module' administration dashboard.