Removed trailing white spaces

Removed trailing whitespaces with

```sh
for file in `grep -r " $" * | cut -d : -f 1 | sort | uniq | grep -v " "`; do sed -i 's/[ \t]*$//' $file; done
```

and some handwork.

templates/repo/bare.tmpl

@@ -14,7 +14,7 @@
     <div id="repo-content" class="clear container">
         <div id="repo-bare">
             <div id="repo-bare-start" class="panel panel-radius">
-                <div class="panel-header"> 
+                <div class="panel-header">
                     <a class="btn btn-small btn-black btn-header btn-radius right" href="{{.RepoLink}}/settings">{{.i18n.Tr "repo.settings"}}</a>
                     <strong>Quick Start</strong>
                 </div>

templates/repo/issue/create.tmpl

@@ -104,8 +104,8 @@
                 </div>
                 {{if .AttachmentsEnabled}}
                 <div id="attached">
-                    <div id="attached-list">                        
-                        <b>Attachments:</b> 
+                    <div id="attached-list">
+                        <b>Attachments:</b>
                     </div>
                 </div>
                 {{end}}

templates/repo/issue/view.tmpl

@@ -45,19 +45,19 @@
                                         <div class="tab-pane issue-preview-content" id="issue-edit-preview">Loading...</div>
                                     </div>
                                 </div>
-                            </div>                        
+                            </div>
                         </div>
                         {{with $attachments := .Issue.Attachments}}
                         {{if $attachments}}
                         <div class="attachments">
                             <span class="attachment-label label label-info">Attachments:</span>
-                                
+
                             {{range $attachments}}
                             <a class="attachment label label-default" href="{{.IssueId}}/attachment/{{.Id}}">{{.Name}}</a>
                             {{end}}
                         </div>
                         {{end}}
-                        {{end}}    
+                        {{end}}
                     </div>
                     {{range .Comments}}
                     {{/* 0 = COMMENT, 1 = REOPEN, 2 = CLOSE, 3 = ISSUE, 4 = COMMIT, 5 = PULL */}}
@@ -145,7 +145,7 @@
                             {{if .AttachmentsEnabled}}
                             <div id="attached">
                                 <div id="attached-list">
-                                    <b>Attachments:</b> 
+                                    <b>Attachments:</b>
                                 </div>
                             </div>
                             {{end}}

templates/repo/settings/collaboration.tmpl

@@ -44,4 +44,4 @@
 	    </div>
 	</div>
 </div>
-{{template "ng/base/footer" .}} 
+{{template "ng/base/footer" .}}

templates/repo/single_file.tmpl

@@ -21,7 +21,7 @@
         </div>
         {{end}}
     </div>
-    
+
     {{if not .FileIsText}}
     <div class="panel-body file-body file-code code-view">
         {{if .IsImageFile}}