Start new selection when clicking outside selection zone

[foxx]

As seen on jquery-upload-crop, it would be nice to start a new selection when clicking outside of the selection zone.

For example, to create a new selection you have to drag the box to the point where you need it, then focus the mouse into the corner, then drag it out. This is a little bit fiddly, especially when repeating this task several times over.

I'll take a look at the code and see if this is something that can be added easily.

[foxx]

Got this working with minimal effort, please confirm and merge at your earliest convenience. I have not triggered a dist/* build, as I didn't want to risk merge conflict with other branches.

On a side note, this is a really neat and clean library, thank you for sharing with us!

[fengyuanchen]

Thank you for your suggestion and commit.

[fengyuanchen]

I have supported this feature from v0.4.0.