Convert test songbooks to YAML

Using http://www.json2yaml.com/

test/test_songbook/datadir.sb

@@ -1,7 +1,6 @@
-{
+bookoptions:
-"bookoptions" : [
+- pictures
-    "pictures"
+datadir:
-  ],
+- datadir_datadir
-"datadir": ["datadir_datadir", "datadir_datadir2"],
+- datadir_datadir2
-"lang": "en"
+lang: en
-}

test/test_songbook/languages.sb

@@ -1,3 +1,2 @@
-{
+datadir:
-"datadir": ["languages_datadir"]
+- languages_datadir
-}

test/test_songbook/syntax.sb

@@ -1,4 +1,3 @@
-{
+datadir:
-"datadir": ["syntax_datadir"],
+- syntax_datadir
-"lang": "en"
+lang: en
-}

test/test_songbook/unicode.sb

@@ -1,4 +1,3 @@
-{
+datadir:
-"datadir": ["unicode_datadir"],
+- unicode_datadir
-"lang": "en"
+lang: en
-}