Check if a table exists in the database.
    :param dbcon: database connection
    :param tablename: table name
    :return: Boolean

def check_table_exists(dbcon, tablename):
    """
    Check if a table exists in the database.
    :param dbcon: database connection
    :param tablename: table name
    :return: Boolean
    """
    dbcur = dbcon.cursor()
    dbcur.execute("SELECT name FROM sqlite_master WHERE type='table' AND name='%s';" % tablename)
    result = dbcur.fetchone()
    dbcur.close()
    if result is None:
        return False
    else:
        try:
            return result[0] == tablename
        except IndexError as e:
            return check_table_exists(dbcon, tablename)