v0.8.3

Modia v0.8.3

Diff since v0.8.2

• Bug fix: Parameters that are Numbers, but not AbstractFloats, and have no unit defined,
  e.g. a Bool or an Int parameter, are no longer converted to FloatType in the generated Code.

Merged pull requests:

• Support Var(init=nothing, start=nothing) (#141) (@MartinOtter)
• Bug fix: Do not convert Bool or Int (without units) to FloatType (#143) (@MartinOtter)