Update the DropSequenceNode to include dropBehavior (currently fixed at RESTRICT).
Update the pom to allow 2013 as year in header.
merge tjoneslo: Fix bug 1167451 - Update the DropSequence node to include the dropBehavior (RESTRICT, CASCADE, DEFAULT) of the other DDL drop nodes.

https://code.launchpad.net/~tjoneslo/akiban-sql-parser/fix-bug-1167451/+merge/159426