Removed index on fulltext message field

Because SQL Server doesn't like that.

You can't specify a field bigger than 900 bytes to be poart of an index:
http://stackoverflow.com/questions/2863993/is-of-a-type-that-is-invalid-for-use-as-a-key-column-in-an-index

This change makes saving the logs faster, which is - im most cases- more common than reading them.
Merge pull request #5 from ravage84/patch-1

Removed index on fulltext message field