Write about different types of leaves and how to use them.

We want to encourage time off, but we also want to keep the business
moving. Time off is important to us, so we need a good way to balance
requests with the workload and cash flow. This is an attempt to document
the process and make sure everyone knows how to ask and what to do after
approval.
Better indentation.
Changes to language and policies.
Changes to time off policy.

* Talk more about the process.
* Outline the process the guide performs.
moving stuff around so it flows better
Unneeded comment on accrual

We don't currently accrue any benefits or do quarterly reviews
Refining the organization of extended leave of absence
Merge pull request #9 from gaslight/time-off-policy

Write about different types of leaves and how to use them.