Add DateTime tests
Add MRound tests
DateTime Round & Truncate
Update version to 0.0.3.0
IsNullOrEmpty & IsNullOrWhiteSpace extensions
Set DoubleBuffered property via reflection
up to 0.0.4.0
Merge dev branch

- Set DoubleBuffered property via reflection
- IsNullOrEmpty & IsNullOrWhiteSpace extensions
- DateTime Round & Truncate
- Add MRound tests
- Add DateTime tests