Copy wiki documentation from last year

[phette23]

I haven't investigated a ton but I see that a wiki's repo is available at

https://github.com/code4lib/2018.code4lib.org.wiki.git

So I think we could clone the 2017 repo's wiki and push it up to this one but I'm not sure.

[phette23]

Hey-o! For posterity, the process was very simple:

# clone the 2 wikis
git clone https://github.com/2017.code4lib.org.wiki.git
git clone https://github.com/2018.code4lib.org.wiki.git
# copy last year into this year, overwriting whatever exists
cp 2017.code4lib.org.wiki/* 2018.code4lib.org.wiki
# add changes & push to github
cd 2018.code4lib.org.wiki
git add .
git commit -m 'copy wiki from last year'
git push