Compatibility issues with mysqldump >=5.6

Hi Shawn,

There is a compatibility issue with this library and mysqldump >=5.6

The "issue" is with mysqldump after version 5.6 where it will output a "warning" message every time you use it and include a password in the command line (which your package does). You can read about the issue extensively here:

http://bugs.mysql.com/bug.php?id=66546

and more here 

http://serverfault.com/questions/476228/whats-a-secure-alternative-to-using-a-mysql-password-on-the-command-line

Whilst the work around is to put the username/password in a specific file, that is not possible for everyone, myself included.

The problem with your package is your process() command in Mysqldumper.php throws an exception, and wont proceed (because mysqldump gave a 'warning' message). By modifying your process() command to ignore that one specific warning, I am able to use your package without issue.

Its a little messy, but I dont see any other way around the problem. Perhaps this could be a configurable item in your package config, so people can optionally ignore this one specific error?
Merge pull request #6 from TheShiftExchange/patch-2

Compatibility issues with mysqldump >=5.6