Adds governance configuration (#152)

* Started drafting CODEOWNERS

* Completed first draft of governance config

* Added more documentation on what's in here and how to read it

.github/CODEOWNERS

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+# *** General format notes
+# - Each line is a file name or pattern followed by one or more owners who will be auto assigned for review.
+# -- Example: <file name or pattern> @<owning group name>
+# - The repo is also configured to require approval from the auto assigned group before something can be merged.
+# - Order is important; the last matching pattern takes the mostprecedence. This means that you should put broad things first.
+
+# *** Groups that are available include:
+# - @bloom-works/handbook-admins : Administrators of the Handbook
+# - @bloom-works/handbook-finances : Folks that control the budget and accounting
+# - @bloom-works/handbook-misc-changes : Things that don't fall into the other groups
+# - @bloom-works/handbook-people-process-and-rituals : People that focus on company culture and HR-y things
+# - @bloom-works/handbook-policies-and-conduct : Those that control company processes and code of conduct topics
+
+# *** Rules
+# If no other review/approval rule catches, it'll go to admins
+# Most things that don't get caught by other rules are probably more technical
+# Change this if that doesn't wind up being the case after some use
+*		@bloom-works/handbook-admins
+
+# These are the controls are specific pages of content
+sections/*		@bloom-works/handbook-misc-changes
+sections/code-of-conduct.md		@bloom-works/handbook-policies-and-conduct
+sections/employment-terms-policies.md	@bloom-works/handbook-people-process-and-rituals
+sections/expenses-and-reimbursement.md		@bloom-works/handbook-finances
+sections/leaving-bloom.md		@bloom-works/handbook-people-process-and-rituals
+sections/outside-activities-conflicts-of-interest.md		@bloom-works/handbook-people-process-and-rituals
+sections/pay-and-benefits.md		@bloom-works/handbook-finances
+sections/time-tracking.md 	@bloom-works/handbook-finances @bloom-works/handbook-people-process-and-rituals
+sections/travel-and-relocation.md 	@bloom-works/handbook-finances @bloom-works/handbook-people-process-and-rituals
+sections/working-hours		@bloom-works/handbook-people-process-and-rituals
+index.md	@bloom-works/handbook-people-process-and-rituals