Upgrade database.

def upgrade():
    """Upgrade database."""
    op.create_table(
        'userprofiles_userprofile',
        sa.Column('user_id', sa.Integer(), nullable=False),
        sa.Column('username', sa.String(length=255), nullable=True),
        sa.Column('displayname', sa.String(length=255), nullable=True),
        sa.Column('full_name', sa.String(length=255), nullable=False),
        sa.ForeignKeyConstraint(['user_id'], [u'accounts_user.id'], ),
        sa.PrimaryKeyConstraint('user_id'),
        sa.UniqueConstraint('username')
    )