Can install ie8_xp
Strip out unused bits of code
Fix up a few things

* Introduce the idea of download, extract, install steps
* Implement generic downloader to download all URIs for a given VM
* Implement generic installer to install all *.ova files into virtualbox, and take an initial snapshot to preserve pristine state
* Fix up a couple of bugs
Script to scrape virtualbox download URLs
Rejig things somewhat
Add concept of local fetch path

Lets you specify a folder that contains the files mies might want to download already, to save downloading them again.

    $ mies install ie10_win8 --fetch-path ~/Documents/ievms
Rename main tool mies and place in bin
Mark the URL grabber as a support file
Merge remote-tracking branch 'gh/master'

Conflicts:
	bin/mies