Consolidate summary generation.
Changed deployer health bar height.
Merge pull request #398 from huwshimi/generate-changeset

Consolidate summary generation

Instead of looping through the changes a number of times to generate the summary this branch merges the functions into one.

QA: There are no visual changes in this branch, the summaries should be generated as before.
Merge pull request #399 from huwshimi/inspector-health-bar-height

Changed deployer health bar height

OK, here goes, I'd set aside a morning for this review.

QA:
- drag a service to the canvas
- click deploy and confirm
- click on the service block
- in the inspector check that the health bar is 10px high