Changed domain models. Added page for changing translations (just a model).

Added tag lib.

grails-app/views/translationsOverview/templates/_language.gsp

@@ -0,0 +1,9 @@
+<g:form action="saveFile" name="${language.languageTag}">
+    <h3>${language.languageTag.toUpperCase()}</h3>
+    <g:each in="${language.translations}" var="translation">
+        <g:set var="key" value="${ts.propertyKey(property: translation)}"/>
+        <label>${key}</label> <g:textField name="${key}" value="${ts.propertyValue(property: translation)}" />
+        <br/>
+    </g:each>
+    <g:submitButton name="save" class="btn btn-primary" value="${g.message(code: 'plugin.translations.action.save')}"/>
+</g:form>