Resolve "Release v1.2.1"

Closes #45

See merge request !41

Resolve "Release v1.2.1"

See merge request !40

Resolve "Fix STATUS.md: offline mode"

See merge request !39

Resolve "Release v1.2.0"

Closes #44

See merge request !38

Resolve "Release v1.2.0"

See merge request !37

Resolve "Provide a callback for notification"

See merge request !36

It is not necessary to pull in componentDidMount because the object have just been opened,
just set the timeout.

In switchConnection: the transaction must be passed as callback to setState because setState is asynchrounous.

Release v1.1.0

Closes #40

See merge request !35

Resolve "Release v1.1.0"

See merge request !34