add support for additional config files about pgpm HOT 1 CLOSED

{
    "description"    : "API for eDarling that collects function to send transactional e-mails to users" ,
    "name"           : "edarling_mailsystem",
    "version"        : "00_00_00",
    "class"          : "postgres_sql",
    "subclass"       : "basic",
    "types_path"     :  ["types_1", "types_2"],
    "functions_path" : "functions" 
}

{
    "user_roles"    : ["role_a", "role_b", "public"],
    "owner_role"    : "role_a",
    "types_path"     :  ["types_1"],
    "functions_path" : "functions" 
}

{
    "user_roles"    : ["role_c", "role_d", "public"],
    "owner_role"    : "role_c"
}