Remove specs depending on specinfra
SpecInfra is renamed to Specinfra
Merge pull request #400 from serverspec/lowercase-specinfra

Rename SpecInfra to Specinfra
Bumpup version
Merge branch 'master' into 2.0

Conflicts:
	README.md
	lib/serverspec/version.rb
	serverspec.gemspec
Remove OS specific specs
Fix specs
Use Specinfra::Runner instead of calling backend method
Merge pull request #406 from serverspec/use-specinfra-runner

Use Specinfra::Runner instead of calling backend method