Fixed in part issue 56, the templates are in the idf subfolder.

src/IDF/templates/idf/source/base.html

@@ -0,0 +1,10 @@
+{extends "idf/base.html"}
+{block tabsource} class="active"{/block}
+{block subtabs}
+<div id="sub-tabs">
+<a {if $inSourceTree}class="active" {/if}href="{url 'IDF_Views_Source::treeBase', array($project.shortname, $project.getScmRoot())}">{trans 'Source Tree'}</a> |
+<a {if $inChangeLog}class="active" {/if}href="{url 'IDF_Views_Source::changeLog', array($project.shortname, $project.getScmRoot())}">{trans 'Change Log'}</a>
+{if $inCommit}| {trans 'Commit'}{/if}
+</div>
+{/block}
+{block title}{$title}{/block}