Gradle support
Merge branch 'master' of git://github.com/smarek/yodaqa into gradle2

Conflicts:
	data/eval/_multistage_traineval.sh
Remove some legacy files
README: Tiny bits for gradle
gradlew: Add graddle wrapper

gradle-2.1 is not in Debian so let's go self-contained.
data/eval/train-and-eval.sh: Omitted gradle verify -> check
gradle-wrapper.jar: Missed file
build.gradle: Pass -D commandline properties to YodaQA
gradle: Fix passing commandline arguments to YodaQA
AnswerScoreLogistic: Retrained with updated model
AnswerTopMarker: Disable
AnswerScoreLogistic: Retrained with updated model
train-and-eval: Always record score *after* retraining model, not before

This yields much less confusing data, even though it hides the fact that
often non-retrained model works better (which can be pretty weird).
data/eval/: Ignore answer*-csv
AnswerScoreLogistic: Update the model