Bump Ruby version to 1.9.3

OS X 10.8 doesn't have a build, and for some reason RVM doesn't want to build it from source:

	$ rvm install ruby-1.9.2-p320
	No binary rubies available for: osx/10.8/x86_64/ruby-1.9.2-p320.
	Continuing with compilation. Please read 'rvm mount' to get more information on binary rubies.
	The provided compiler '/usr/bin/gcc' is LLVM based, it is not yet fully supported by ruby and gems, please read `rvm requirements`.
ignore .ruby-version
Use curl -o instead of wget in Arch x64

wget is yet another dependency we don't necessarily need, use the already provided curl instead
Merge pull request #844 from ColinHebert/wget

Use curl -o instead of wget in Arch x64
Update URL for Win7X86 ISO
Update to latest VBOX_VERSION to download correct GuestAdditions
Enable RDP for Win7X86
Merge pull request #846 from DevOpsLive/master

Updated Windows 7 x86 Evaluation
Merge pull request #772 from jobyh/my-templates

ignore .ruby-version
Merge pull request #842 from leopoiroux/master

Add definition for Debian 6.0.8 (i386 and amd64)
Fix Gemfile with https for github
Merge pull request #849 from bjorand/fix-gemfile-gh-https

Fix Gemfile with https for github
Fix small typo (mybuntubox -> myubuntubox)
Merge pull request #853 from sunsations/typo

Fix small typo (mybuntubox -> myubuntubox)
Adding CentOS 6.5 templates
Merge pull request #854 from runseb/master

Adding CentOS 6.5 templates
Added Windows 8.1 to known OS types (as Windows81, Windows81_64)
Merge pull request #858 from mormegil-cz/add-win81-ostype

Added Windows 8.1 to known OS types (as Windows81, Windows81_64)
added solaris 11 64bit vbox
Merge pull request #859 from ccope/solaris-11

added solaris 11 64bit vbox