Introduce database code and remove unused block key

All code should be done within the new code directory.
Created db.py for reading the YAML file.

Removed block key from blocks; always a None value.

code/db.py

@@ -0,0 +1,16 @@
+import json
+import yaml
+
+DATA="../data/styrman-blocks.yml"
+
+def load_yaml(filename):
+    with open(filename, 'r') as f:
+        return yaml.safe_load(f)
+
+def main():
+    data = load_yaml(DATA)
+    json_data = json.dumps(data, indent=2)
+    print(json_data)
+
+if __name__ == "__main__":
+    main()

data/styrman-blocks.yml

@@ -2,8 +2,7 @@
 # Text blocks
 
 blocks:
-  - block:
+  - layer: 1
-    layer: 1
     texts:
     - text: |
         Matti Matinpk
@@ -25,8 +24,7 @@ blocks:
         oli veljensä Eerik Matinpojan
         jälkeen isäntänä Vävylässä
         v. 1749-1779
-  - block:
+  - link: 1
-    link: 1
     layer: 2
     texts:
     - text: |
@@ -70,8 +68,7 @@ blocks:
         Juho Jaakonpk, Mauno Junonpk, Paavo Maunonpk,
         ja Olli Paavonpk Takala
       link: 3
-  - block:
+  - link: 2
-    link: 2
     layer: 3
     texts:
     - text: |
@@ -104,8 +101,7 @@ blocks:
         Mikkola
         s.06.05.1808
         k.xx.xx.xxxx
-  - block:
+  - link: 3
-    link: 3
     layer: 3
     texts:
     - text: |
@@ -132,8 +128,7 @@ blocks:
         pso
         Juho Eerikinpk
         Rantala
-  - block:
+  - link: 4
-    link: 4
     layer: 4
     texts:
     - text: |
@@ -156,8 +151,7 @@ blocks:
         Mikkola
         s.16.04.1843 Elimäki
         k.xx.xx.xxxx
-  - block:
+  - link: 5
-    link: 5
     layer: 4
     texts:
     - text: |