Adjust encode to work with BCD values
Debug print to show the BCD digits
Add ulong opEquals overload
Update unit test
Update the string ctor
Update unit test
Update ulong ctor
Fix serialization
Test the character-to-number conversion function
Updated the opCast implementations
Merge pull request #76 from joichiro/bcd

Change Integer to work with BCD-15 values
The BCD-15 format stores 15 BCD digits in a 64-bit word as packed-BCD digits.