Merge pull request #1 from avbdr/master

Merge from avbdr
Add prefix feature

Set a prefix with the connection...
Update MysqliDb.php
Update readme.md
Update MysqliDb.php
Update MysqliDb.php
Update MysqliDb.php
Set Prefix update

Set prefix with a own method.
Update readme.md
Update for prefix
Merge pull request #5 from screeper/master

Added table prefix feature