Extended readme and nuget package
Added formatting test and fixed bug in formatting
Add unary operstors
Added more operators and tests
First (test) contribution: Small changes in README.
Merge pull request #1 from gormac/develop

First (test) contribution: Small changes in README.
Added (generated) Specs.txt file to .gitignore.
Changed unit tests to use FluentAssertions library.
Changed ReSharper C# naming style for private fields.
Add override methods for explicit rounding
Merge pull request #2 from gormac/develop

Added (generated) Specs.txt file to .gitignore.
Added InvalidCurrencyException
Enabled NiGet resstore for build server
Fixed and add test for formatting ExhangeRate
Added RoudingMode to all
ZWK and LVL are made historic,
ZWM added
Improved naming.
Changed Currency unit tests to use FluentAssertions library.
Merge pull request #4 from gormac/develop

Changed Currency unit tests to use FluentAssertions library.
Added contributing guidelines