New upstream version 0.6.1

.github/workflows/java8.yml

.gitignore

.travis.yml

README.md

pom.xml

...ava/com/google/code/externalsorting/BinaryFileBuffer.java

...in/java/com/google/code/externalsorting/ExternalSort.java

...n/java/com/google/code/externalsorting/IOStringStack.java

.../com/google/code/externalsorting/csv/CSVRecordBuffer.java

.../com/google/code/externalsorting/csv/CsvExternalSort.java

...a/com/google/code/externalsorting/csv/CsvSortOptions.java

...va/com/google/code/externalsorting/csv/SizeEstimator.java

...ava/com/google/code/externalsorting/ExternalSortTest.java

.../google/code/externalsorting/csv/CsvExternalSortTest.java

src/test/resources/externalSorting.csv

src/test/resources/externalSortingSemicolon.csv

src/test/resources/externalSortingTabs.csv

src/test/resources/nonLatinSorting.csv