add binlog row minimal and noblob image support
add some explanation for using bitmap
try to fix float object is not iterable
try fix again
try fix again

TypeError: unsupported operand type(s) for &: 'float' and 'int'
try fix, I hate python's dynamic type

TypeError: 'float' object cannot be interpreted as an integer
try fix error

TypeError: bytearray indices must be integers
try fix

error: unpack requires a string argument of length 4
try fix

error: unpack requires a string argument of length 4
remove confused comment
variable b renamed to cols_bitmap
use simple bit operations instead

not use mysql bitmap
add minimal row image test
fix test error
Merge pull request #103 from siddontang/master

add binlog row minimal and noblob image support