Plugins folder: ignoring everything not explicitly added

git-svn-id: http://mc-server.googlecode.com/svn/trunk@1681 0a769ca7-a7f5-676a-18bf-c427514a06d6
Added a shortcut for running under helgrind with the most common parameters and suppressions

git-svn-id: http://mc-server.googlecode.com/svn/trunk@1682 0a769ca7-a7f5-676a-18bf-c427514a06d6