* Added `getLog` method to `Repository`.
  * Added `ILogOptions` to make the method friendlier to extension.
  * Options include `prevCount` and `format`, to effect our use case which is `git log -1 format=%B`.
* Added this to the client-server communication pipeline.

* Removed all previous commit message code.
* Changed `getCommitInfo` call to return a string that is the template contents.
  * Removed from `IModel`, `IRawStatus`
* Still has issue of locating `~/some/path/with/tilde` in it.
  * path.resolve resolves to the repo's `.build` path and not the user folder.
  * I'm testing this on Windows, and I don't know the behavior on Linux.

* I'm going ahead and commiting changes for possibility of others seeing this code. I will rely on later being able to correctly rebase changes.
* Added `getCommitInfo` to the git command chain: `IRawGitService`, `GitService`, `GitChannel`, `ChangesView`.
* Is erroring in a side-effect that I am having problems debugging, as the contributing guidance doesn't explain debugging the node process side (explicitly anyway).

fixes #3385

fixes #4214

# Conflicts:
#	src/vs/languages/html/common/htmlTags.ts

fixes #907
related to #150