bitmap dump code via QAPI framework

Signed-off-by: Sanidhya Kashyap <sanidhya.iiith@gmail.com>
hmp interface for dirty bitmap dump

Signed-off-by: Sanidhya Kashyap <sanidhya.iiith@gmail.com>
cancel mechanism for an already running dump bitmap process

Signed-off-by: Sanidhya Kashyap <sanidhya.iiith@gmail.com>
set the frequency of the dump bitmap process

Signed-off-by: Sanidhya Kashyap <sanidhya.iiith@gmail.com>
python script for extracting bitmap from a binary file

Signed-off-by: Sanidhya Kashyap <sanidhya.iiith@gmail.com>