**Features**
1. Added base support for AWS Redshift SQL dialect.
Added support for ENCODE property in column.
Added new --output-mode='redshift' that add to column 'encrypt' property by default.
Also add table properties: distkeys, sortkey, diststyle, encode (table level encode), temp.
Supported Redshift statements: SORTKEY, DISTSTYLE, DISTKEY, ENCODE
CREATE TEMP / TEMPORARY TABLE
syntax like with LIKE statement:
create temp table tempevent(like event);