[TxMt] SmartyPants references in the Markdown bundle

[Rob McBroom]

Hello. It looks like `SmartyPants.pl` is still hard-coded in these  
commands.

     Markdown.tmbundle/Commands/Markdown preview.plist
     Markdown.tmbundle/Commands/MultiMarkdown Preview.tmCommand
     Markdown.tmbundle/Commands/↓↓ Convert Document:Selection to  
HTML.plist
     Markdown.tmbundle/Commands/↓↓ Convert Document:Selection to  
LaTeX (Memoir).plist
     Markdown.tmbundle/Commands/↓↓ Convert Document:Selection to  
LaTeX.plist
     Markdown.tmbundle/Commands/↓↓ Convert Document:Selection to  
PDF.plist
     Markdown.tmbundle/Commands/↓↓ Convert Document:Selection to  
RTF.plist
     Markdown.tmbundle/Commands/↓↓ Generate Output and open in  
Browser.plist

If someone gets a chance, can they be updated to use "$ 
{TM_SMARTYPANTS:-SmartyPants.pl}" instead? Thanks.

---
Rob
<http://www.skurfer.com/>