webapp: New preferences page allows enabling/disabling debug logging at runtime, as well as configuring numcopies and diskreserve.

templates/configurators/main.hamlet

@@ -4,9 +4,9 @@
       <h3>
         <a href="@{RepositoriesR}">
           Manage repositories
-     <p>
-       Distribute the files in this repository to other devices, #
-       make backups, and more, by adding repositories.
+      <p>
+        Distribute the files in this repository to other devices, #
+        make backups, and more, by adding repositories.
     <div .span4>
       $if xmppconfigured
         <h3>
@@ -21,4 +21,10 @@
             Configure jabber account
        <p>
          Keep in touch with remote devices, and with your friends, #
-         by configuring a jabber account.
+    <div .span4>
+      <h3>
+        <a href="@{PreferencesR}">
+          Preferences
+      <p>
+        Tune the behavior of git-annex, including how many copies #
+        to retain of each file, and how much disk space it can use.

templates/configurators/preferences.hamlet

@@ -0,0 +1,13 @@
+<div .span9 .hero-unit>
+  <h2>
+    Preferences
+  <p>
+    <form .form-horizontal enctype=#{enctype}>
+      <fieldset>
+        ^{form}
+        ^{webAppFormAuthToken}
+        <div .form-actions>
+          <button .btn .btn-primary type=submit>
+            Save Preferences
+          <a .btn href="@{ConfigurationR}">
+            Cancel