Updated readme.md to include jobs.json for 2017-03-01-preview where necessary.

Regenerated swagger to include job step and target executions, sku name and capacity support in agent createOrUpdate and get, as well as filter for top executions.

Job examples were updated to reflect correct json request and response paramters for agent and target group.

Updates to jobs.json as well as examples, this time keeping out readme.md until ready to publish sdk

Updated readme.md to include jobs.json. Fixed job step output examples

Fixing readme.md based on feedback. Ordered jobs.json alphabetically in it's 2017-03-01-preview regions as well as removed comment for difference between v3 and v2