0.4.7 make barcode improvement

[anyonetff]

MakeBarcode easy to use as Java API

1. Rewrite process to fix some default value problem
2. Add processToStream to create OutputStream
3. Add processToByte to create byte[]
4. Add setters to Settings, add whiteSpace Support
5. Add SymbolType, SymbolFormat
6. Add WhiteSpace Support, Add BarHeight Support

Problem found:

1. the EAN-8, EAN13, data length validator is not smart
2. the EANX offsetX is not correct. the digits is out of canvas.