ADD: a TODO has been added. If the left side of a SET expression is a reserved keyword, it should be changed to colref.

git-svn-id: https://php-sql-parser.googlecode.com/svn/trunk@1347 44dcfd11-89b7-3d55-2063-5c365055f77f
Merge branch 'svnsync'

ADD: a TODO has been added. If the left side of a SET expression is a reserved keyword, it should be changed to colref.