Optimize: optimize memory copy in MemoryBlock by move constructor and move assignment.

[ifplusor]

optimize memory copy in MemoryBlock by move constructor and move assignment.

[jovany-wang]

No need to change such many codes that looks like nothing different.

[ifplusor]

No need to change such many codes that looks like nothing different.

CRLF -> LF

[jovany-wang]

@ifplusor Thanks for your explanations.
I don't think we should change CRLF to LF in a feature change PR.
It will make us confused for your changes.

I think it's better to request another PR to do the CRLF change.
In this PR, just to do the Optimization, so that we could read what you changed.

[ifplusor]

@ifplusor Thanks for your explanations.
I don't think we should to change CRLF to LF in a feature change PR.
It will make us confused for your changes.

@jovany-wang yeah, i will split commit.