Add support for 'UNLOGGED' tables

Support the PostgreSQL 9.1+ ‘UNLOGGED’ table feature
Merge pull request #66 from Rodac/postgresql-features

Add support for 'UNLOGGED' tables
unlogged inlucded in deparser
Merge branch 'master' of https://github.com/Rodac/JSqlParser

Conflicts:
	src/main/java/net/sf/jsqlparser/statement/create/table/CreateTable.java
	src/test/java/net/sf/jsqlparser/test/create/CreateTableTest.java