contract size limitation

[SurfingNerd]

we should adapt the maximum contract size to really what we need.

[SurfingNerd]

contract size is also inherently limited by the maximum transaction size.

[SurfingNerd]

goal value: double the size of Ethereum (24k) = 48k

[cryptonit]

https://github.com/ethereum/EIPs/blob/master/EIPS/eip-170.md

the original reasoning there is also linked to the max blockgaslimit

and as our blockgaslimit is like 20x the blockgaslimit of etherem a max contractsize of just 2x the ethereum max contracsize should keep us on the save side and still allow developers more flexibility