Update PHP to 5.5.19 and 5.6.3 for security fixes
updated crate version to 0.45.4
Merge pull request #315 from infosiftr/php-security-fix

Update PHP to 5.5.19 and 5.6.3 for security fixes
Merge pull request #316 from crate/master

updated crate version to 0.45.4