Moved amendments to appendix of Constitution

Procedural Amendment moved to bottom of Constitution. In the future, all
non-trivial amendments will be included in the same manner.
Fixed small typo and parallelism

In 2.3.2 and 2.3.5, Historian and O'Domhnail's Supplier was not plural, but the
rest of the constitution is plural. Also, 6.1.4 did not match the structure of
6.1.3, even though they are the same sentiment.