Dbg work

some more bit for dbg-api.
According to dbg interface:
ram usage before work on dbg:
>info ram
ALLOCRAM Current Addr 0x5352bc
ALLOCRAM Remaining Bytes 42308

after last commit:
>info ram
ALLOCRAM Current Addr 0x535234
ALLOCRAM Remaining Bytes 42444

So, if we can trust this information, we have 136 Bytes more :)