INSTALL: Sprinkle a few UTF-8 in the mysql documentation

INSTALL: Sprinkle a few UTF-8 in the mysql documentation

When not specifying the charset/collation, I managed to create a latin1
database where all strings were encoded in latin1. That's really not
ideal. Adding 'CHARACTER SET utf8' when creating the DB fixes it. Then:

$ ./manage.py syncdb

will correctly create tables with UTF-8 encoded rows.

However, for some reason, when django creates the test tables, that
default, DB wide, encoding is not respected and one needs to provide an
additional TEST_CHARSET entry in the config dictionary.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>