Updated steps in exercise 2
Updated exercises 3 and 4. Updated Overview and Summary
Removed exercise 1. Removed unused screenshots
Updated Lab.xml. Minor wording fix in document
Removed extra step in exercise 3. Added note in exercise 2. Wording and style fixes
Updated Readme. Added dependency in depi file
Added note in Getting Started. Added screenshot
Updated script in exercise 1. Wording fixes
Updated dependencies
Merge pull request #4 from WindowsAzure-Preview/master

Updated document flow and general fixes