Move the en-GB language plugin into the core

We need to have the default language baked into the core so that we
don’t have problems if no language plugins are available.

core/language/en-GB.tid

@@ -0,0 +1,7 @@
+title: $:/languages/en-GB
+name: en-GB
+description: English (British)
+author: JeremyRuston
+core-version: >=5.0.0"
+
+Stub pseudo-plugin for the default language

core/wiki/languageswitcher.tid

@@ -3,6 +3,6 @@ title: $:/snippets/languageswitcher
 {{$:/lingo/ControlPanel/Language/prompt}} <$view tiddler={{$:/language}} field="description" format="text"><$view tiddler={{$:/language}} field="name" format="text"><$view tiddler={{$:/language}} field="title" format="text"/></$view></$view>
 
 <$linkcatcher to="$:/language">
-<$list filter="[plugin-type[language]sort[title]]"><div><$reveal state="$:/language" type="match" text={{!!title}}>&bull;</$reveal><$reveal state="$:/language" type="nomatch" text={{!!title}}>&nbsp;</$reveal> <$link to={{!!title}}><$view field="description" format="text"><$view field="name" format="text"><$view field="title" format="text"/></$view></$view></$link></div>
+<$list filter="[[$:/languages/en-GB]] [plugin-type[language]sort[title]]"><div><$reveal state="$:/language" type="match" text={{!!title}}>&bull;</$reveal><$reveal state="$:/language" type="nomatch" text={{!!title}}>&nbsp;</$reveal> <$link to={{!!title}}><$view field="description" format="text"><$view field="name" format="text"><$view field="title" format="text"/></$view></$view></$link></div>
 </$list>
 </$linkcatcher>

core/wiki/minilanguageswitcher.tid

@@ -1,6 +1,6 @@
 title: $:/snippets/minilanguageswitcher
 
 <$linkcatcher to="$:/language">
-<$list filter="[plugin-type[language]sort[title]]"><div><$reveal state="$:/language" type="match" text={{!!title}}>&bull;</$reveal><$reveal state="$:/language" type="nomatch" text={{!!title}}>&nbsp;</$reveal> <$link to={{!!title}}><$view field="description" format="text"><$view field="name" format="text"><$view field="title" format="text"/></$view></$view></$link></div>
+<$list filter="[[$:/languages/en-GB]] [plugin-type[language]sort[title]]"><div><$reveal state="$:/language" type="match" text={{!!title}}>&bull;</$reveal><$reveal state="$:/language" type="nomatch" text={{!!title}}>&nbsp;</$reveal> <$link to={{!!title}}><$view field="description" format="text"><$view field="name" format="text"><$view field="title" format="text"/></$view></$view></$link></div>
 </$list>
 </$linkcatcher>

languages/de-AT/plugin.info

@@ -4,6 +4,5 @@
 	"plugin-type": "language",
 	"description": "German (Austria)",
 	"author": "JeremyRuston",
-	"core-version": ">=5.0.0",
-	"dependents": ["$:/languages/en-GB"]
+	"core-version": ">=5.0.0"
 }

languages/en-GB/plugin.info

@@ -1,8 +0,0 @@
-{
-	"title": "$:/languages/en-GB",
-	"name": "en-GB",
-	"plugin-type": "language",
-	"description": "English (British)",
-	"author": "JeremyRuston",
-	"core-version": ">=5.0.0"
-}

languages/en-US/plugin.info

@@ -4,6 +4,5 @@
 	"plugin-type": "language",
 	"description": "English (US)",
 	"author": "JeremyRuston",
-	"core-version": ">=5.0.0",
-	"dependents": ["$:/languages/en-GB"]
+	"core-version": ">=5.0.0"
 }

languages/fr-FR/plugin.info

@@ -4,6 +4,5 @@
 	"plugin-type": "language",
 	"description": "French (France)",
 	"author": "JeremyRuston",
-	"core-version": ">=5.0.0",
-	"dependents": ["$:/languages/en-GB"]
+	"core-version": ">=5.0.0"
 }