checklist to finish paper

[x] missing references
[x] add some more recent references
[x] #40
[x] #41
[x] include climwin version used to ID climate outliers (https://github.com/forc-db/ForC/commit/21e8b7e33b735473d3b4913714b7d2c496d4b8b5)
[x] confirm/find ref for this statement: "*tropical countries are more likely to apply Tier 1 methodology that bases forest C budgets on previously existing data [@ref]."
[x] can this statement be expressed according to Tiers? "to records from countries relying on existing records (as opposed to regular collection of new data through forest inventories)"
[x] #42
[x] #43
[x] #44
[x] update code pulling out n records by variable (~l. 150-162)
[x] check that conclusions from histogram figure don't change with updated results
[x] #45
[x] #46
[x] #48
[x] #49
[x] incorporate Sandro's edits
[x] change "accounting" (including in title)
[x] "transferred to EFDB" --> "submitted to EFDB"
[x] #51
[x] integrate Susan's comments
[x] properly insert footnotes in appendix b table
[x] fix references that aren't rendering

forc-db / IPCC-EFDB-integration