add some print statements to monitor lasso/enet progress and tweaks parameters...

add some print statements to monitor lasso/enet progress and tweaks parameters to make it faster to run

git-svn-id: https://scikit-learn.svn.sourceforge.net/svnroot/scikit-learn/trunk@688 22fbfee3-77ab-4535-9bad-27d1bd3bc7d8