Embedded MySQL support

As of version 0.31 i implemented embedded mysql. There are definitively some issues. One of those issues is that the embedded mysql library also seems experimental, i encountered some bugs which i cannot help. Like the mysql_create_database api succeeding if the database does not yet exist, but generating an Access Violation (!) if the database already exists.. You can circumvent that be just doing a query like 'create database somebase', but that is of course only a workaround.
Anyhow, the library works with current (4.0.18) production version on windows. haven't test unix platforms.
Another thingy is the library loading. Currently i use the same unit for that, because all api's are almost identical. I do not really feel like copying the unit, so i have to find another way. For the momemt being, you just cannot just mysql client and embedded mysql simultaniously. Ideas for fixes welcome, i have some ideas myself but have to think it over.