feature request: case insencitive mode and float torrance

[cubercsl]

Some problems may have specal judge, like "Yes" and "No" or float number compare.

But most time we use cf test testing these problems will fail.

So I think we can add the support for the testlib std checkers.

[infalmo]

This would over complicate the tool. An easier method would be to ignore case while comparing the output with the expected output.

[cubercsl]

This would over complicate the tool. An easier method would be to ignore case while comparing the output with the expected output.

Yes, may be. But I think we should add an option whether to compare in case sencitive mode and float torrance.

[infalmo]

Is this good (for floating comparisions)

And case insensitive mode

[cubercsl]

Is this good (for floating comparisions)

And case insensitive mode

It looks very good~