Implemented an extended user profile based on a patch from Jethro Carr (issue 510).

Changes with respect to the original patch:
- use Gconf instead of separate table / data scheme
- better form validation for URLs and emails
- no htmlentity-encoded contents in the database (pluf automatically safe-encodes
  stuff before it writes out contents into templates)
- add visual separators in the form views to have a distinct view of basic
  (important) data and other data which are only displayed in the public profile
- give a hint about the maximum display size of 60x60 px^2 and use max-width and
  max-height in the templates to avoid nasty distortions by the browser
- use target=_blank and rel=nofollow on the twitter and website links in the profile
- some whitespace / formatting / code style fixes

src/IDF/templates/idf/user/myaccount.html

@@ -9,7 +9,7 @@
 </div>
 {/if}
 
-<form method="post" action=".">
+<form method="post" enctype="multipart/form-data" action=".">
 <table class="form" summary="">
 <tr>
 <th>{trans 'Login:'}</th>{aurl 'url', 'IDF_Views_User::view', array($user.login)}
@@ -53,6 +53,46 @@
 {$form.f.password2|unsafe}
 </td>
 </tr>
+<tr><td colspan="2" class="separator">{trans "Public Profile"}</td></tr>
+<tr>
+<th>{$form.f.description.labelTag}:</th>
+<td>{if $form.f.description.errors}{$form.f.description.fieldErrors}{/if}
+{$form.f.description|unsafe}
+</td>
+</tr>
+<tr>
+<th>{$form.f.twitter.labelTag}:</th>
+<td>{if $form.f.twitter.errors}{$form.f.twitter.fieldErrors}{/if}
+{$form.f.twitter|unsafe}
+</td>
+</tr>
+<tr>
+<th>{$form.f.public_email.labelTag}:</th>
+<td>{if $form.f.public_email.errors}{$form.f.public_email.fieldErrors}{/if}
+{$form.f.public_email|unsafe}
+</td>
+</tr>
+<tr>
+<th>{$form.f.website.labelTag}:</th>
+<td>{if $form.f.website.errors}{$form.f.website.fieldErrors}{/if}
+{$form.f.website|unsafe}
+</td>
+</tr>
+<tr>
+<th>{$form.f.custom_avatar.labelTag}:</th>
+<td>{if $form.f.custom_avatar.errors}{$form.f.custom_avatar.fieldErrors}{/if}
+{$form.f.custom_avatar|unsafe}<br />
+<span class="helptext">{$form.f.custom_avatar.help_text}</span>
+</td>
+</tr>
+<tr>
+<th>{if $form.f.remove_custom_avatar.errors}{$form.f.remove_custom_avatar.fieldErrors}{/if}
+{$form.f.remove_custom_avatar|unsafe}
+</th>
+<td>{$form.f.remove_custom_avatar.labelTag}<br />
+<span class="helptext">{$form.f.remove_custom_avatar.help_text}</span></td>
+</tr>
+<tr><td colspan="2" class="separator">{trans "Key Management"}</td></tr>
 <tr>
 <th>{$form.f.public_key.labelTag}:</th>
 <td>{if $form.f.public_key.errors}{$form.f.public_key.fieldErrors}{/if}

src/IDF/templates/idf/user/public.html

@@ -2,9 +2,39 @@
 {block body}
 <table class="form" summary="">
 <tr>
-<th></th>
+<th style="text-align: right">{if $user_data.avatar != ''}
+    <img style="max-height: 60px; max-width: 60px;" src="{media}/upload/avatars/{$user_data.avatar}" alt=" " />
+{else}
+    <img src="http://www.gravatar.com/avatar/{$member.email|md5}.jpg?s=60&amp;d={media}/idf/img/spacer.gif" alt=" " />
+{/if}
+</th>
 <td>{$member}</td>
 </tr>
+{if $user_data.description != ''}
+<tr>
+<th>{trans 'Description:'}</th>
+<td>{$user_data.description}</td>
+</tr>
+{/if}
+{if $user_data.twitter != ''}
+<tr>
+<th>{trans 'Twitter:'}</th>
+<td><a rel="nofollow" target="_blank" href='http://twitter.com/{$user_data.twitter}'>{$user_data.twitter}</a></td>
+</tr>
+{/if}
+{if $user_data.public_email != ''}
+<tr>
+<th>{trans 'Public Email:'}</th>
+<td><a href='mailto:{$user_data.public_email}'>{$user_data.public_email}</a></td>
+</tr>
+{/if}
+{if $user_data.website != ''}
+<tr>
+<th>{trans 'Website:'}</th>
+<td><a rel="nofollow" target="_blank" href='{$user_data.website}'>{$user_data.website}</a></td>
+</tr>
+{/if}
+
 <tr>
 <th>{trans 'Last time seen:'}</th>
 <td>{$member.last_login|dateago}</td>