Fixed

#10 Some changes to confirm exclusion protocol draft

• User-agent names are case-insensitive: case insensitive match for names
• Comment cannot be used to separate records:
• Fix generated regex pattern: optimize regex for lessen backtrack and occational warning.

thanks to @ranvis !

Added

#11 update gitignore - to be comfortable for develop
#12 update composer.json phpunit version update and apply PSR-4
#13 replace null statement with const for clearly