SDK-core - first commit
Added GenerateSDK.php
SDK-cores are Updated
updated Authentication manager
Updating SDK-core files
updating SDK -core files
Added method escapeInvalidXmlCharsRegex() to fix JIRA SDK-571
PHP core SDK changes
  - Fixed logging manager to write to custom log file
  - Fixed bug in certificate credential - passing in cert passphrase
  - Removing config setting for bypassing server cert validation
  - Added support for third party authorization using subject.
PPUtils.php updated with additional methods, AuthenticationManager.php  namespace change to ns from urn
PHP nvp and xml serialization,deserialization(PPMessage,PPXmlMessage) files committed
Refactored certifcate credential constructor
Remodelling credential classes
Bumping up PHPUnit version to 5.3 - Removing 'require' of PHPUnit/Framework.php
Adding initial composer.json file
Rewriting authentication model & handler classes.
Changes for
  - invoking SOAP services
  - using certificate credential
Adding credential to PPRequest class
Adding FormatterFactory class for creating formatter objects
Got token authorization working
Refactoring PPHttpConfig class
Updating validation rules for 3-token credential
Fix for array deserialization in SOAP
Adding AA specific headers