The emitted warning is "ISO C++98 does not support the ‘%lg’ gnu_printf
format [-Wformat=]".
Though "%lg" is required for *scanf functions to indicate the field
size, it is not required for *printf functions which use "%g" instead.
It has its own GoogleDriveTokenRefresher and knows how to do info().
This commit also contains JSON int -> long long int fix and
CurlJsonRequest '\n' -> ' ' fix.
This commit also adds CloudThread class, which work() method is called
every second by TimerManager.
Right now it prints JSON examples on the console, so that's why it's
introduced with SimpleJSON library.
