* test functions moved from Decimal to tests/Main

* Added Typeable instance to Decimal
* multiplication bug found
* More tests added
* Multiplication function fixed
* normalizeDecimal and eitherFromRational added
* Fractional and RealFrac instances added, now Decimal can be writen as literal
* Version bumped to 0.2.4
Merge pull request #1 from s9gf4ult/master

Added Typeable instance to Decimal