Adds client argument to Account constructor
Adds client argument to Account constructor

to support passing the mock client

Signed-off-by: Christopher Rogers <551f4eee005e3e519560e2feb8988249d292c73e@gmail.com>

developer-devPHP/recurly-client-php,cgerrior/recurly-client-php,developer-devPHP/recurly-client-php,phpdave/recurly-client-php,lyrixx/recurly-client-php