81, add || operator

Extend where.jj parsing

Add || operation to class BinaryOperation

Add unit test TestSqlParser.testEvaluateBinaryOperationsConcat,
extend TestSqlParser.testParsingQueryEnvironmentEntries
80, add subquery error messages
Merge branch 'master' of ssh://git.code.sf.net/p/csvjdbc/code

Conflicts:
	src/main/java/org/relique/jdbc/csv/BinaryOperation.java
	src/main/javacc/org/relique/jdbc/csv/where.jj
	src/test/java/org/relique/jdbc/csv/TestSqlParser.java
Bump version to 1.0.21-kwaxi-2