merge dv

ci/appveyor/sakia.iss

ci/travis/debian/DEBIAN/control

ci/travis/debian/usr/share/applications/sakia.desktop

res/i18n/ts/cs.ts

res/i18n/ts/de.ts

res/i18n/ts/es.ts

res/i18n/ts/fr.ts

res/i18n/ts/it.ts

res/i18n/ts/pl.ts

res/i18n/ts/pt.ts

res/i18n/ts/ru.ts

src/sakia/__init__.py

src/sakia/app.py

src/sakia/data/entities/connection.py

src/sakia/data/graphs/base_graph.py

src/sakia/data/processors/blockchain.py

src/sakia/data/processors/certifications.py

src/sakia/data/processors/identities.py

src/sakia/data/processors/nodes.py

src/sakia/data/repositories/connections.py