[IATI/IATI-Extra-Documentation#74] Update summary table urls
[IATI/IATI-Rulesets#12] Generate ruleset summary page
Don't clobber files when combining docs

fixes IATI/IATI-Websites#87
Dedent codelist descriptions, fixes #36
Fix codelist attribute linkage, fixes #35
[IATI/IATI-Extra-Documentation#40] Move Subelements section to the bottom of the page
Ignore dotfiles, fixes #37
Move meta documentation to the Developer Documentation

Now availible at
https://github.com/IATI/IATI-Developer-Documentation/blob/master/ssot/proposal.rst

Main reason for doing this was because the document is tied to a
specific version of the standard, so updating in this repository woulb
mean keeping changes synced across multiple branches.
[IATI/IATI-Rulesets#12] Move rules_text to rulesets repository
[IATI/IATI-Codelists#30] Link/refer to CLv1 and CLv2
Fix typo (Github->GitHub)
Remove _static from download urls
[IATI/IATI-Websites#94] Updates -> upgrades
[IATI/IATI-Extra-Documentation#40] "From the schema" -> Definition
[#7] Add license
[IATI/IATI-Websites#83] Escape ampersands instead of using literal blocks in schema table
[IATI/IATI-Schemas#75] Make clear what elements the schema requires to have subelements
[#39] Read sitemap URL from file
overview -> how-to-publish
[#44] Add line stating whether a codelist is Embedded