Issue with taskpaper formatting when using archive command

I was running into an issue where when I archived, it was not respecting the indent level and it was leaving a return between the archived task and the @project tag.

I also accidently ran autopep8 against the code.  I apologize.  The only substantive change is:

```
if self.project_postfix:
  eol = (self.before_tasks_bullet_spaces + self.view.substr(task).lstrip() +
```
to 

```
if self.project_postfix:
  eol = (self.before_tasks_bullet_spaces * 2 + self.view.substr(task).strip() +
```