insert/update Functions calls draft, Support Array as limit value, Properly reset groupBy properly, count variable for selects, getLastQuery() and more verbose getLastError()

insert/update Functions calls
as per https://github.com/ajillion/PHP-MySQLi-Database-Class/issues/88
Support Array as limit value
as per https://github.com/ajillion/PHP-MySQLi-Database-Class/issues/89

Properly reset groupBy properly
as per https://github.com/ajillion/PHP-MySQLi-Database-Class/pull/91

count variable for selects
as per https://github.com/ajillion/PHP-MySQLi-Database-Class/pull/81

getLastQuery()
as per https://github.com/ajillion/PHP-MySQLi-Database-Class/issues/95

getLastError()
Includes error which generates statement rather then just mysqli object