75, add SQL SUBSTRING function

Added unit test TestCsvDriver.testSubstringFunction.
75, add SQL SUBSTRING function

Added unit test TestCsvDriver.testSubstringFunction.
Merge branch 'master' of ssh://git.code.sf.net/p/csvjdbc/code

Conflicts:
	src/main/javacc/org/relique/jdbc/csv/where.jj
Bumped version to 1.0.21.3