bugfix - merged the pull request https://github.com/fieldtrip/fieldtrip/pull/51 from Thomas, renamed colorlim into clim, also mention it in the documentation


git-svn-id: svn+ssh://svn.fcdonders.nl/home/svnroot/fieldtrip/trunk@10024 0cf7c7f0-3615-4144-b4e6-68da3bce3cd0