Merge branch 'hivesigner' into 'develop'

_resources/hivesigner_libs.md

_resources/steem_connect_libs.md

_services/hivesigner.md

_tutorials-javascript/hivesigner.md

docs/CONTRIBUTING.html

docs/index.html

docs/resources/hivesigner_libs.html

docs/services/hivesigner.html

docs/sitemap.xml

docs/tutorials-ruby/vote_on_content.html

docs/unused/community.html

docs/unused/database_api.html

docs/unused/docker.html

docs/unused/steemd.html

docs/unused/tags.html

docs/unused/tutorials.html

.../devportal-tutorials-js/tutorials/02_hivesigner/README.md

...torials/02_hivesigner/images/account_type_application.png

...ls-js/tutorials/02_hivesigner/images/hivesigner_login.png

...ls-js/tutorials/02_hivesigner/images/hivesigner_myapp.png