Address issue 20
Modified section 3.4 Connectivity Management to include use
of Update to move from connected to routing states
gen-art-86

- Added definitions for "Overlay Parameters" and "Configuration
  Document".

[Note that this patchset need to be rebased after Gen-ART-82 is applied]
gen-art-85

- Fix SHOULD NOT and MUST NOT.
gen-art-78

- Clarify that "now that it has received an Update from AP" refers to
  the previous diagram, and that "it is shown connecting" refers to only
  one predecessor.
gen-art-8

- Moved the RFC 2119 section after "Application Support Overview" and
  before "Overlay Management Protocol.

Closes deanwillis/p2psip-base-master#145
gen-art-19

- Add a reference to 6.3.2.1 in the definition of
  "configuration_sequence".
- Add a reference to 6.7 in the definition of "transaction_id".
gen-art-54

- Added reference to section 11.3.
gen-art-51

- Added anchor to Probe Request Definition section.
- Added links to registry definitions for:
  - Overlay Algorithm Type
  - Application-ID
  - Data Model
  - Error Code
  - Overlay Link Registry
  - Link Protocols
  - Forwarding Option
  - Probe Information Types
  - Message Extensions
gen-art-72

- Fix as suggested.
gen-art-66

- s/These protocols/These three protocols.
gen-art-73

- Fix as suggested.
gen-art-74

- Fix as suggested.
gen-art-71

- Fix as sugegsted, but with CHORD-RELOAD instead of Chord-RELOAD.
gen-art-70

- Fix as suggested.
gen-art-65

- Fixed missing closing parenthesis.
- Added references to sections.
gen-art-61

- Fixed the text as suggested.
gen-art-62

- Fix as suggested.
gen-art-58

- Replaced the example by a reference to 6.3.2.
gen-art-57

- Add reference to 6.4.2.4.