title: MATLAB VLFeat mex error : 'mt' is not recognized
body: <p>I'm trying to setup vlfeat 0.9.20 with MATLAB R2015a, on Windows 8 64 bit.</p>
  
  <p>I installed Microsoft Windows SDK 7.1, and ran <code>mex -setup</code>, it seems to find the SDK properly.</p>
  
  <p>But when I run <code>vl_compile;</code> I get the following error :</p>
  
  <pre><code>vl_compile: assuming that Visual C++ is the active compiler
  vl_compile: compiling for PCWIN64 (64 bit)
  MEX C:\Users\Name\Documents\MATLAB\Tools\vlfeat-0.9.20\toolbox\aib\vl_aib.c
  Building with 'Microsoft Windows SDK 7.1 (C)'.
  Error using mex
  'mt' is not recognized as an internal or external command,
  operable program or batch file.
  
  
  Error in vl_compile (line 140)
      mex(cmd{:}) ;
  </code></pre>
  
  <p>How can I fix this error?</p>
  
  <p>Thanks !</p>