add PHP_VERSION check

C. Fahner <christiaanenzo@gmail.com>
add permission exception string

C. Fahner <christiaanenzo@gmail.com>
update executeApiCall method

C. Fahner <christiaanenzo@gmail.com>
update SessionManager session id algorithm
add MongoDate use-statement
remove useless use-statements

C. Fahner <christiaanenzo@gmail.com>
add core/session_begin ApiCall

C. Fahner <christiaanenzo@gmail.com>
update ApiCall
update call mechanism

C. Fahner <christiaanenzo@gmail.com>