Make vim better for markdown editing

- Make vim-pandoc handle following md links wiki-style
- Bring back concealing of formatting

.vim/ftplugin/pandoc.vim

@@ -1,5 +1,6 @@
-" Stop excessive concealing of markdown formatting markers
-:set conceallevel=0
-
 " Remove the gutter that shows markdown nesting level by default
 :set foldcolumn=0
+
+" Auto chdir to where the pandoc file is opened so pandoc calls and
+" markdown hypertext links work dir-relative.
+:lchdir %:p:h

.vimrc

@@ -90,6 +90,13 @@ let g:pandoc#syntax#codeblocks#embeds#langs = ["python", "bash=sh", "sh"]
 let g:pandoc#syntax#conceal#blacklist = ["ellipses", "quotes"]
 let g:pandoc#syntax#conceal#urls = 1
 
+" Create the file if you follow an orphaned link
+let g:pandoc#hypertext#create_if_no_alternates_exists = 1
+
+" Make link follows split horizontally since most of my terms are tall
+" Also work around a netrw bug that opens every no-modify
+let g:pandoc#hypertext#split_open_cmd = "botright split +set\\ modifiable"
+
 " Unfold everything by default
 set foldlevel=99