More seamless background images for larger displays

- Made the 4 main hero images subtly fade to black
- Make body background colour black to hide background edges
- Slightly adjusted related background styles to avoid !important
declarations where possible
Remove unnecessary empty body rule
Actually adding updated background images

Ooops.
Merge remote-tracking branch 'upstream/master' into background-images
translation of site UI strings into Korean.
upload mo file.
Removing outdated information

The getResponseHeaders() bug has been fixed in all browsers.
update UI String
fix unmatched msgid & msgstr
Fixes some issues with the article reporting tool
Correcting yaml file errors
Merge pull request #611 from WillsB3/background-images

Background images
Merge pull request #638 from monsur/patch-1

Removing outdated information
aligned all google accounts to G+ id
changed G+ profile link url
Merge pull request #625 from cwdoh/korean

Translate site UI strings into Korean.
Merge pull request #648 from agektmr/authorship

Authorship Fixes #647
#649 - adding ordering to dates in the article report
Fixes #649 - Adds fixes to quarter report.
Adds article state
Adds ordering of dates
Removes redundant 'over due'
Merge pull request #650 from html5rocks/article_report

Fixes #649 - Adds fixes to quarter report.