0.3.0

• Removed .useAll, replace with .react.
• Introduced non-memoized computations.
• Removed .withSelf, replaced with .withPrev.
• Introduced prevOr: Returns a given fallback value instead of throwing NoValueException.
• Bugfixes
• Introduced a shorthand dollar notation for defining computed values.
• Allow data source initial values to be specified as functionals.