Update and rename SettingUpDevEnvironment.md to SettingUpVagrantEnvironment.md
Add guide for using shared examples
Fix stray single quotes in testing guide

ASCII single quotes should be used.
Merge pull request #62 from zhangsu/patch-3

Fix stray single quotes in testing guide
Merge pull request #60 from zhangsu/patch-1

Add guide for using shared examples
Merge pull request #56 from munrocape/patch-1

Update and rename SettingUpDevEnvironment.md to SettingUpVagrantEnvironm...
Add syntax highlighting for Ruby snippets