Log Message:
json2tsv: Update to 0.8

Changes:
0.8
---
- Optimize number parsing for large number datasets
- Add -F and -R options to allow to specify a different field and record
  separator
- Print \n and \t also when using -F/-R options
- Documentation improvements

0.7
---
- Use unlocked I/O by default
- Fix gcc warnings
- Documentation improvements