v0.0.4

This is a "bugfix" release

Bugfixes

• Revert assumed multiply behaviour introduced in v0.0.3 (see #7).
  In version v0.0.3 an change was introduced that multiplied the register data that was returned by 10 if the scalefactor is 0.
  However, it turned out that there aren't any scalefactor 0 registers in the victron documentation.
  These 0 values were in fact 0.1 or 0.01 entries that weren't correctly displayed in numbers on mac.
  This bugfix removes treating 0 scalefactor as a special case in total.
  As well as introduces the correct scale factor in the register ledger entries of this integration

New features

• Initial attempt at supporting gracefull unavailable state.
  This is an initial attempt at supporting the unavailable state when an (partial) update of the entities failes.
  It also changes the failure from an error to an warning with basic resolve instruction.

Full Changelog: v0.0.3...v0.0.4