Change logic to be able to write into separate files.
Merge branch 'master' of github.com:smikhalev/sql-server-utils

Conflicts:
	data-pump/src/main/java/com/smikhalev/sqlserverutils/TableReaderProvider.java
	data-pump/src/main/java/com/smikhalev/sqlserverutils/exportdata/TableWriterProvider.java
	data-pump/src/main/java/com/smikhalev/sqlserverutils/exportdata/ValueEncoder.java
	data-pump/src/test/java/com/smikhalev/sqlserverutils/test/TableReaderProviderStub.java
	data-pump/src/test/java/com/smikhalev/sqlserverutils/test/TableWriterProviderStub.java