Update 2013-12-19-how-to-learn-vim.md

Slight changes + paragraph on how to navigate the help hyperlinks.

One thing that threw me is that none of the external links are styled in a way that indicates they are clickable, even on hover.  I appreciate minimalism, but the goal of this is to get people to click things to go read, so a little affordance might encourage that.

That said, this is a good intro and the links are all super handy.  I'm not sure if *you* think this way with vim, but the thing that helps me is to always be thinking about cursor movement—what do I want to do and where must the cursor move to do that?  Vim's power is "number + command + movement" and it took me a *long* time to understand that.