Merge branch 'develop' into 'master'

_introduction/welcome.md

_layouts/default.html

_quickstart/choose_library.md

_quickstart/hive_full_nodes.md

_quickstart/testnet.md

_services/imageHoster.md

_services/jussi.md

_testnet/index.md

_tutorials-javascript/getting_started.md

_tutorials-javascript/reblogging_post.md

_tutorials-javascript/submit_comment_reply.md

_tutorials-javascript/submit_post.md

_tutorials-python/edit_content_patching.md

_tutorials-python/get_post_details.md

_tutorials-python/getting_started.md

_tutorials-recipes/node-config.md

_tutorials-recipes/plugin-and-api-list.md

_tutorials-recipes/setting-up-a-testnet.md

_tutorials-ruby/blog_feed.md

_tutorials-ruby/edit_content_patching.md