Checkpoint exception handling improvements.
Merge branch 'master' of github.com:cojen/Tupl
Merge remote-tracking branch 'remotes/origin/master' into repl
Update copyright year.
Merge remote-tracking branch 'remotes/origin/master' into repl

Conflicts:
	src/main/java/org/cojen/tupl/RedoLogTxnScanner.java
	src/main/java/org/cojen/tupl/RedoLogVisitor.java
Update copyright year.