Should escape grep in nvm_ls
Merge pull request #468 from egilkh/master

Should escape grep in nvm_ls
Adding a failing test.
Fixing `nvm ls 0.x` to only include `0.x.*` instead of `0.x*.*`
Use [0-9] instead of [[:digit:]] per https://github.com/creationix/nvm/pull/466#discussion_r14853668 - it's simpler (and probably more portable).