* Added support for changing Video Memory Start Address
** It lets us do hardware double buffering as well as hardware scrolling
** Functions added: cpct_setVideoMemoryPage, cpc_setVideoMemoryOffset

* Added doubleBuffer example
** It writes sprites to 2 different banks of memory (0xC000 and 0x8000) and switchs between them.

* Deleted Z80FLAG --calle-saves from putSprites example (it was useless)
* Restored --no-std-crt0 to putSprites example
* Moved newton sprite definition to global space with const modifier (consts are treated as ROM values by SDCC and do not need to be initialized, effectively occupying only 1 space in the binary file).