convert meta and tag directives to TOML frontmatter

command:
```
find * -type f -name '*.md' -execdir perl -MTOML::Tiny=to_toml -C63 -gni -E '%x=();s/\[\[!meta\s+(title|date)="?([^\]"]+?)\s*"?\s*\]\]\s*\n*/$x{$1}=$2;""/eg; s/\[\[!meta\s+stylesheet="?edu"?\s+rel="?stylesheet"?\s*\]\]\n*/$x{taxonomies}{categories}=["education"];""/e; s/\[\[!tag((?:\s+[^\]\s]+)+)\s*\]\]\n*/push @{$x{taxonomies}{tags}}, $1=~m{\S+}g;""/eg; s/\[\[!meta\s+(?:author|name)="?([^\]"]+?)\s*"?\s*\]\]\s*\n*/$x{extra}{author}=$1;""/eg; say "+++"; say to_toml({%x}); say "+++"; say $_' '{}' +
```

9 files changed, 36 insertions, 2 deletions

diff --git a/aabneture/2021/april/index.md b/aabneture/2021/april/index.md
index 7fa38262..b422b31d 100644
--- a/aabneture/2021/april/index.md
+++ b/aabneture/2021/april/index.md
@@ -1,3 +1,6 @@
++++
+
++++
 # Åbne ture i april
 [[Tilbage til hovedoversigten|/aabneture]]  
 [[Januar]] | [[Februar]] | [[Marts]] | [[Maj]] | [[Juni]]
@@ -219,3 +222,4 @@ Med Paul Hartvigson.
 ---
 [[Januar]] | [[Februar]] | [[Marts]] | [[Maj]] | [[Juni]]
 ---
+
diff --git a/aabneture/2021/august/index.md b/aabneture/2021/august/index.md
index b445411e..9d55c659 100644
--- a/aabneture/2021/august/index.md
+++ b/aabneture/2021/august/index.md
@@ -1 +1,4 @@
-# August
\ No newline at end of file
++++
+
++++
+# August
diff --git a/aabneture/2021/februar/index.md b/aabneture/2021/februar/index.md
index c848c291..1ff89c96 100644
--- a/aabneture/2021/februar/index.md
+++ b/aabneture/2021/februar/index.md
@@ -1,3 +1,6 @@
++++
+
++++
 # Februar
 [[Tilbage til hovedoversigten|/aabneture]]  
 [[Januar]] | [[Marts]] | [[April]] | [[Maj]] | [[Juni]]
@@ -84,3 +87,4 @@ Med Morten Lander Andersen.
 ---
 [[Januar]] | [[Marts]] | [[April]]
 ---
+
diff --git a/aabneture/2021/januar/index.md b/aabneture/2021/januar/index.md
index 573ba5a5..2544fe4b 100644
--- a/aabneture/2021/januar/index.md
+++ b/aabneture/2021/januar/index.md
@@ -1,3 +1,6 @@
++++
+
++++
 # Januar
 [[Tilbage til hovedoversigten|/aabneture]]  
 [[Februar]] | [[Marts]] | [[April]] | [[Maj]] | [[Juni]]
@@ -136,3 +139,4 @@ Med John Volfrom.
 ---
 [[Februar]] | [[Marts]] | [[April]]
 ---
+
diff --git a/aabneture/2021/juli/index.md b/aabneture/2021/juli/index.md
index 0fd5bbbc..33f2e8ec 100644
--- a/aabneture/2021/juli/index.md
+++ b/aabneture/2021/juli/index.md
@@ -1,3 +1,6 @@
++++
+
++++
 # Åbne ture i juli
 
 [[Tilbage til hovedoversigten|/aabneture]]  
@@ -250,4 +253,4 @@ Med Jeannie Krysiak.
 **Pris:** 125 kr.  
 [Køb billet på Billetto](https://billetto.dk/e/christianshavn-lordagsvandring-billetter-552023)
 
----
\ No newline at end of file
+---
diff --git a/aabneture/2021/juni/index.md b/aabneture/2021/juni/index.md
index 5e6e5b3b..27672673 100644
--- a/aabneture/2021/juni/index.md
+++ b/aabneture/2021/juni/index.md
@@ -1,3 +1,6 @@
++++
+
++++
 # Åbne ture i juni
 
 [[Tilbage til hovedoversigten|/aabneture]]  
@@ -275,3 +278,4 @@ Med Morten Lander Andersen.
 **Tid:** Lørdag 16.1. kl. 17.00-18.45.  
 **Pris:** 125 kr.  
 [Køb billet på Billetto](https://billetto.dk/e/indre-osterbros-hemmeligheder-med-morten-lander-andersen-billetter-547735)
+
diff --git a/aabneture/2021/maj/index.md b/aabneture/2021/maj/index.md
index 581a1552..e63b2b22 100644
--- a/aabneture/2021/maj/index.md
+++ b/aabneture/2021/maj/index.md
@@ -1,3 +1,6 @@
++++
+
++++
 # Åbne ture i Maj
 [[Tilbage til hovedoversigten|/aabneture]]  
 [[Januar]] | [[Februar]] | [[Marts]] | [[April]] | [[Juni]]
@@ -601,3 +604,4 @@ Med Jeanette Land Schou.
 [Køb billet på Billetto](https://billetto.dk/e/kunsten-pa-kajen-fra-nyhavn-til-slotsholmen-billetter-530387)
 
 ---
+
diff --git a/aabneture/2021/marts/index.md b/aabneture/2021/marts/index.md
index f9a0e8ee..fe236ddd 100644
--- a/aabneture/2021/marts/index.md
+++ b/aabneture/2021/marts/index.md
@@ -1,3 +1,6 @@
++++
+
++++
 # Marts
 [[Tilbage til hovedoversigten|/aabneture]]  
 [[Januar]] | [[Februar]] | [[April]] | [[Maj]] | [[Juni]]
@@ -229,3 +232,4 @@ De er blandet med personlige erindringer fra Jeannie Krysiak.
 ---
 [[Januar]] | [[Februar]] | [[April]]
 ---
+
diff --git a/aabneture/2021/september/index.md b/aabneture/2021/september/index.md
index 399f4dca..88c8fac9 100644
--- a/aabneture/2021/september/index.md
+++ b/aabneture/2021/september/index.md
@@ -1,3 +1,6 @@
++++
+
++++
 September
 
 ---
@@ -59,3 +62,4 @@ Med Christian Kronman.
 **Pris:** 80 kr., 125 kr.  
 [Køb billet på Billetto](https://billetto.dk/e/sondagsrundvisning-med-gadedigteren-pa-assistens-kirkegard-billetter-558642)
 
+