Merge "Docs: Adding general OTA content, new images Updating with comments from google doc (tbao and xi zhao) Adding reference to options for ota_from_target_files Adding feedback changes Adding 2nd set of feedback changes Adding 3rd set of feedback changes Adding 4th set of feedback changes Breaking content into multiple files, adding block ota, adjusting toc Renamed .jd files, update TOC and document links Adding in dougz's feedback on recovery images, split out 5x vs 4x and earlier Minor text tweaks Fixing merge conflict Adding in dougz's comment Setting 80 column width in all files Adding feedback, moving up one level Adding ota mailing list, cropped localized text image, teaser blub on tech/index, mailing list to community page (includes several edits to meet 80 character column limit) Update mailing list verbiage, added feedback to builtin functions from tbao (in google doc)"
