documentation - made description of cfg.zlim consistent across plotting functions


git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@9748 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0
fixing small bug in ft_componentanalysis


git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@9749 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0