[Koha] MySQL and utf8 in the installation instructions

[Erik Lewis]

Just a thought but something that has bothered me about the  
instructions for installing Koha.  In the instructions your pointed to  
warnings about installing with utf8 and no real approachable guidance  
on how to ensure you create your Koha database in MySQL as utf8.

Wouldn't this addition to all the instructions fix that problem and  
alleviate the need to do extensive reading on MySQL character sets?

create database koha character set utf8