This version introduces a new SalsaAPI class, with methods that replace the functionality of salsa_api_query(). The class is faster and more robust, and supports better error handling. The salsa_api_query() function will remain for the time being, but will be marked as @deprecated beginning with the 7.x-1.0-beta1 release. Please convert your modules to use the new SalsaAPI class instead of salsa_api_query().
An updated DEVELOPERS.txt is forthcoming with full documentation on the methods in the new class; for now see the comments in salsa_api.inc. In general: