p6_base 6.x-1.1

Minor updates. No need to update production websites with this release.

Note: templates directory is moved from base theme to sub-theme. If you update the theme, you may need to compare each file for changes.

• Fixed #1438248: Translation warnings
• Moved templates inside p6 sub-theme.
• Updated Modernizr to 2.5.3; removed p6 prefix from class names.
• Created template.php for p6 sub-theme, moved non-base functions from base theme.
• Updated available class name references in theme.css

See commit log for more details.