Minor Fixes: Gzip Compression, Password Enclosure

Howdy, just a few minor changes.

1. I've enclosed the password in quotations. If your mysql password contained special characters (such as $) the command to connect to the database would not work. By wrapping them this safeguards things. Specs updated.

2. Minor type-o in error that caught be up, specified s3config, when should of been s3_config

3. Allowed the compression rate of gzip to be specified in the s3_config file under the key 'compression'. Using a compression rate of -9 was effecting the CPU to the point where it would impact our site. This should allow anyone who wants to, to reduce it.