Update de.json with translated closed-source note about Android

plus add empty lines for better overview & some very small translations
Update de.json
Merge pull request #680 from Cathryne/master

Update de.json with translated closed-source note about Android
updated es.json
Merge pull request #685 from IsacDaavid/master

updated es.json
fix #683 and #684 by defaulting to the canonical English version for all browser locales, complete fix in 2.0
Merge branch 'master' of github.com:nylira/prism-break
es.json followup. Fixed typos and style
Merge pull request #686 from IsacDaavid/master

es.json followup. Fixed typos and style
add section for scheduling services

with two examples:
Doodle (proprietary) and Dudle (free)
resize doodle and dudle images
fix i18n class for Scheduling header
add translation stubs for i18n-scheduling and i18n-dudle-desc
use higher quality image for Doodle, thanks to Zegnat