Execute options are now parsed via php_array functions, which makes the options case-sensitive.
A helper function is now used to convert legacy options for the original three execute methods into an array. This simplifies option parsing in php_phongo.c.
Additionally, Manager methods now perform their own server selection, which means that execute functions in php_phongo.c can rely on a server_id being provided.
Tests have been updated to expect a serverId option when relevant (e.g. query opts). Additionally, error tests for execute methods have been improved so that invalid values for all known options are tested.