adds flag `--verbose` as equivalent for config file `verbose = true`
Normalizes paths displayed from `search` module, used for searching and listing installed rocks
take urls into account besides local paths
Merge pull request #207 from Tieske/normpath

Normalize search and list output paths on Windows
Merge pull request #206 from Tieske/verbose_flag

adds flag `--verbose` as equivalent for config file `verbose = true`
Try versioned "lua" names before the unversioned one.
Should improve on behavior mentioned at
http://stackoverflow.com/questions/20321560/how-do-install-libraries-for-both-lua5-2-and-5-1-using-luarocks/20359102?noredirect=1#comment30696438_20359102
Merge branch 'master' of github.com:keplerproject/luarocks
Make sure value of tree is propagated correctly to commands.