Mentioned in [48323] on Core SVN:
External Libraries: First step of updating jQuery.

Reopened ticket #18788 on Core Trac:
Remove redundant type attributes from script and style tags

Created ticket #30974 on Core Trac:
Use a JSON file for theme and plugin details

Reopened ticket #9409 on Core Trac:
Mandatory setting for variable uploads_use_yearmonth_folders

Mentioned in [24412] on Core SVN:
Twenty Thirteen markup cleanup:

Created ticket #24499 on Core Trac:
Twenty Thirteen: Remove trailing slashes on void elements, remove type ...