Use pristine version string when constructing path to box
Use pristine version string when constructing path to box

Without this change, the version string may be mutated when passed through
Gem::Version.new(version).to_s before being used to construct the box
directory.  This is a problem when using prerelease version numbers because,
for example, it will look for "~/.vagrant.d/boxes/1.0.0.pre.alpha.1" when it
should be looking for "~/.vagrant.d/boxes/1.0.0-alpha.1".

PatrickLang/vagrant,benizi/vagrant,gitebra/vagrant,lonniev/vagrant,signed8bit/vagrant,bryson/vagrant,benh57/vagrant,benizi/vagrant,kamigerami/vagrant,mwrock/vagrant,signed8bit/vagrant,sax/vagrant,sni/vagrant,PatrickLang/vagrant,TheBigBear/vagrant,carlosefr/vagrant,aneeshusa/vagrant,TheBigBear/vagrant,sni/vagrant,signed8bit/vagrant,crashlytics/vagrant,mitchellh/vagrant,mwrock/vagrant,mitchellh/vagrant,mitchellh/vagrant,vamegh/vagrant,lukebakken/vagrant,bshurts/vagrant,justincampbell/vagrant,benh57/vagrant,taliesins/vagrant,bdwyertech/vagrant,gitebra/vagrant,mitchellh/vagrant,marxarelli/vagrant,benizi/vagrant,aneeshusa/vagrant,kamazee/vagrant,tomfanning/vagrant,PatrickLang/vagrant,lukebakken/vagrant,kamazee/vagrant,bdwyertech/vagrant,justincampbell/vagrant,benizi/vagrant,vamegh/vagrant,lonniev/vagrant,chrisroberts/vagrant,krig/vagrant,Chhed13/vagrant,bshurts/vagrant,krig/vagrant,bdwyertech/vagrant,jtopper/vagrant,bshurts/vagrant,PatOShea/vagrant,PatrickLang/vagrant,mwrock/vagrant,marxarelli/vagrant,gitebra/vagrant,petems/vagrant,vamegh/vagrant,marxarelli/vagrant,sax/vagrant,sax/vagrant,PatOShea/vagrant,taliesins/vagrant,taliesins/vagrant,aneeshusa/vagrant,crashlytics/vagrant,bryson/vagrant,crashlytics/vagrant,bdwyertech/vagrant,justincampbell/vagrant,petems/vagrant,aneeshusa/vagrant,krig/vagrant,mwrock/vagrant,kamigerami/vagrant,jtopper/vagrant,sni/vagrant,crashlytics/vagrant,justincampbell/vagrant,PatOShea/vagrant,chrisroberts/vagrant,gitebra/vagrant,sax/vagrant,sni/vagrant,petems/vagrant,benh57/vagrant,jtopper/vagrant,tomfanning/vagrant,kamigerami/vagrant,lukebakken/vagrant,tomfanning/vagrant,TheBigBear/vagrant,petems/vagrant,tomfanning/vagrant,chrisroberts/vagrant,bshurts/vagrant,Chhed13/vagrant,jtopper/vagrant,marxarelli/vagrant,lukebakken/vagrant,krig/vagrant,benh57/vagrant,PatOShea/vagrant,kamazee/vagrant,kamazee/vagrant,bryson/vagrant,taliesins/vagrant,carlosefr/vagrant,carlosefr/vagrant,lonniev/vagrant,TheBigBear/vagrant,Chhed13/vagrant,Chhed13/vagrant,chrisroberts/vagrant,bryson/vagrant,carlosefr/vagrant,vamegh/vagrant,signed8bit/vagrant,lonniev/vagrant,kamigerami/vagrant