Fix recursive install of dependecies when running naclports 'install'
Fix recursive install of dependecies when running naclports 'install'

This change fixes two issues with automatic installation of
dependencies.  Firstly, IsInstalled() now work correctly
when given just a package name.  Secondly, we make sure that
all dependencies are installed (not just built) before
installing a package.

Also, now that we have 'uninstall' remove the
--force-install option.

R=binji@chromium.org

Review URL: https://codereview.chromium.org/321563005

git-svn-id: 84b3587ce119b778414dcb50e18b7479aacf4f1d@1307 7dad1e8b-422e-d2af-fbf5-8013b78bd812

kuscsik/naclports,dtkav/naclports,Schibum/naclports,kuscsik/naclports,Schibum/naclports,yeyus/naclports,kuscsik/naclports,dtkav/naclports,Schibum/naclports,dtkav/naclports,yeyus/naclports,yeyus/naclports,kuscsik/naclports,kuscsik/naclports,yeyus/naclports,Schibum/naclports,yeyus/naclports,Schibum/naclports,dtkav/naclports,yeyus/naclports,dtkav/naclports,Schibum/naclports