1.2.14

What is new:

1. add support for all syslog facilities
2. test: add long log test
3. add '-' to the list of accepted characters in category name
4. add API to get zlog version
5. add %k formatter, leading 0's formatting
6. add API for category log level checking
7. fix compile errors on some platform
8. minor bug fixes

We are working on:

1. performance improvement
2. cmake build system
3. test coverage improvement