We need ability to stop Pipeline

[MikhailLipanin]

It is very useful to stop pipeline via provided Function<XML, Boolean> in Xsline.java:
Now we use Xsline via

new Xsline(train).pass(xml)

But we can set a condition of terminating pipeline like that:

new Xsline(train).pass(
    xml,
    (xml) -> {
        "some checks on XML"
        returns Boolean;
    }
)

So all Shifts in train will be applied, while provided Function<XML, Boolean> is true

[MikhailLipanin]

@yegor256 , need to release for related problem in EO

[yegor256]

@rultor release, tag is 0.15.0

[rultor]

@rultor release, tag is 0.15.0

@yegor256 OK, I will release it now. Please check the progress here

[rultor]

@rultor release, tag is 0.15.0

@yegor256 Done! FYI, the full log is here (took me 10min)