Not opening mail in browser

I set up letter_opener in my rails project, but when delivering the email it didn't open in the browser as it used to do. I have used letter_opener before, but this time wasn't working.

The problem was that Launchy could not open the file. I was getting this error
```
Launchy::ApplicationNotFoundError: No application found to handle '/Users/adrian/Icalia%20Labs/tmp/letter_opener/1368036004_b89703f/rich.html'
```
I tried it in the console using the direct path for the file and it was working without the `URI.escape(filepath)` but when I tried escaping the filepath I got the same error. Adding `file://` solves it.
Maybe is an error with Launchy.

I checked out the code and saw that this line in file `lib/letter_opener/delivery_method.rb` 
has been changing on and off adding the `file://` part
```
Launchy.open(URI.parse(URI.escape(messages.first.filepath)).to_s)
```
My question is, why did you decide to remove `file://` part?
Does anybody have the same issue?
I made a fork and reverting to add the `file://` worked for me.