Gas limit for getter functions

[anton-trunov]

[Shvandre]

Denis Subbotin (TonApi lead iirc) says

It would be nice if execution of all “standard” get_wallet_data type hetmetodes could be within 200k gas. Execution of custom methods depends on what to execute through. Locally you can use somewhere up to 20-30 million through the emulator. Any more than that is quite risky. Different api offer different gaslimit. In tonapi.io, for example, 1 million, I think.