Caption2Ass_PCR: Fix calculation of PCR value
Caption2Ass_PCR: Integrate common code
Caption2Ass_PCR: Cosmetics
Caption2Ass_PCR: Fix typo
Caption2Ass_PCR: Separete the initialization code for handlers
Caption2Ass_PCR: Define the error code of application
Caption2Ass_PCR: Fix memory leak
Caption2Ass_PCR: Rename the names of structure and variable
Caption2Ass_PCR: Fix the calculation of timestamp

- Integrate common code of timestamp
- Fix the detection code of drop packets
- Fix the detection code of wrap-around
- Fix a information of log output
- Add '-keepinterval' option
Caption2Ass_PCR: Define the invalid value of timestamp
Caption2Ass_PCR: Add the load functions of cli parameters for debug