Update README.md

Author: danatcofo

README.md

@@ -8,5 +8,5 @@ This is an integration solution for integrating [Prefix.io](http://www.prefix.io
 Provides a Tool Window that shows a list of traces profiled by Prefix. 
 
 * Source: Prefix.VS-Ext.2015
-* Installer: [VSIX\Installs\Prefix.2015.vsix](VSIX/Installs/PREFIX.2015.vsix)
+* Installer: [VSIX\Installs\Prefix.2015.vsix](VSIX/Installs/PREFIX.2015.vsix?raw=true)