v2.0.1

Bug fixes and patches for issues in v2.0.0 including:

• Added PHP version check, minimum 5.3.0
• Fix for handling no results from analytics query
• Fix for PHP versions with non standard query separator in configuration
• More verbose exception messages for authentication key file
• Fix for authentication failing with fopen request method
• Added support for metrics/dimensions with numbers in name
• Fix for PHP autoloader failing to find key file in some instances
• Issues with querying account data have been resolved.