In modisUtils.R, moved general functions to genutils package.
In modisClean.R, removed require(mvbutils) and added mvbutils as dependency.
In modisDownload.R, added quick settings-dl.fast,dl.smart and dl.renew.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/remotesensing@279 edb9625f-4e0d-4859-8d74-9fd3b1da38cb