Fixes URL for unar

[sergionsz]

As Google Code's URL for unar returns a 404 status code, this commit updates the download address to http://wakaba.c3.cx/releases/TheUnarchiver/unar1.10.1.zip (see #236 (comment)).

This is a very old version of the software (current version is 3.11.1, so perhaps this should be updated too.

Note: I was able to install unar using homebrew so maybe we should check for 'brew' and install from there.

[thom4parisot]

If you do brew install unar, ievms seems happy enough with it.

$ brew install unar
Updating Homebrew...
==> Downloading https://homebrew.bintray.com/bottles/unar-1.10.1.sierra.bottle.tar.gz
Already downloaded: /Users/oncletom/Library/Caches/Homebrew/unar-1.10.1.sierra.bottle.tar.gz
==> Pouring unar-1.10.1.sierra.bottle.tar.gz
==> Caveats
Bash completion has been installed to:
  /usr/local/etc/bash_completion.d
==> Summary
🍺  /usr/local/Cellar/unar/1.10.1: 77 files, 13.6MB

oncletom at brillat-savarin in ~
$ DEBUG=* iectrl install 'IE11 - Win7'
  iectrl:IE11 - Win7 install +0ms
  iectrl:IE11 - Win7 ievms: bash -c curl -s https://raw.githubusercontent.com/xdissent/ievms/master/ievms.sh | bash +6ms
  iectrl:IE11 - Win7 ievms: Checking for VirtualBox +831ms
  iectrl:IE11 - Win7 ievms: Checking for Oracle VM VirtualBox Extension Pack +0ms
  iectrl:IE11 - Win7 ievms: Pack no. 0:   Oracle VM VirtualBox Extension Pack +60ms
  iectrl:IE11 - Win7 ievms: Building IE 11 VM +1ms
  iectrl:IE11 - Win7 ievms: Checking for existing OVA at /Users/oncletom/.ievms/IE9 - Win7.ova +5ms
  iectrl:IE11 - Win7 ievms: Downloading OVA ZIP from https://az412801.vo.msecnd.net/vhd/IEKitV1_Final/VirtualBox/OSX/IE9_Win7.zip to IE9_Win7.zip (attempt 1 of 3) +0ms

[fabianmarz]

The brew solution works for me. Thanks @oncletom!