Add note about escaping in shells

[ghost]

When I ran the install command in zsh, it reported zsh: no matches found: Polymer/polymer#^1.2.0. So I added a small note.

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[ghost]

Signed!

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CLAs look good, thanks!

[robdodson]

Actually I'm wondering why we're encoding a specific version number here? Wouldn't bower install --save polymer/polymer be a better approach?

[ghost]

It wouldn't, because that would grab 1.2.3, which I believe is a dev version (not sure though!)

[robdodson]

1.2.3 is just the latest release (we don't do dev versions). When you run bower install --save it writes whatever the latest tag is to your bower.json. The advantage is you'll always get the latest and greatest (which is important if we do a major version revision but forget to go back and update the article). Ultimately it's probably not a huge deal, but just something I noticed. If at some point we're on Polymer v1.5.7 it's going to feel weird to tell folks to peg their install to 1.2.3

[arthurevans]

It used to just say #^1.0, to pin it to "latest version >= 1.0, < 2.0," which seemed appropriate.
But people keep updating it while I'm not looking :D

[robdodson]

If you do bower install --save polymer/polymer it'll give you ~.1.2.3 which will protect from a major version rev. I think we should shorten it to that command

[arthurevans]

That makes sense. I guess the #^version is a holdover from the 0.5 days. I'll merge this and massage the text a bit.

[arthurevans]

Just realized that if we don't include the #^1.2.0, we don't need the note. Sorry. A little slow today.

[arthurevans]

New PR here: #1488