Compute and include KA po file metadata, and overall package sizes, into language pack metadata.
Merge branch 'develop' of github.com:learningequality/ka-lite into 1265
Separate ka and kalite translation %, handle some errors.
Detect failed build for more informative error
Merge branch '1265' of github.com:bcipolli/ka-lite into 1265
don't cache language pack info on admin/update pages.
Merge branch '1265' of github.com:bcipolli/ka-lite into 1265
Reorg script code, add area for metadata.
Merge branch 'develop' of github.com:learningequality/ka-lite into 1265
Merge pull request #1270 from bcipolli/1265

Update language pack metadata to include KA po metadata, package size