Fixed a few english mistakes

I still have some questions about the following phrases. If you explain the context or show me where they are in the site, I could help you to fix them:

```
ib_index:

  'apply'=>'Apply',
  'question:num_questions'=>'Numbers to display',
  'friends:yours' => "Your following",
  'friends:owned' => "%s's following",
  'friends:collections' => "Followers collections", // does friend's collection mean list ?
  'reference:subject'=>'New reference',
  'reference:body'=>' %s in question(<a href="%s">%s</a>):add new reference:%s ��',
  'question:this'=>'Question this question',
  'help:about'=>'About Miifang',
  'feedback:desc'=>'Please decribe it with more detail.',
  'messages' => "All news", // Do you mean messages ? 
  'messages:title' => "Subtitle",


projects:

  'river:join:object:default'=>'%s Join %s',
  'project:Apply:success'=>"Submit success, Thanks for your application:)",
  'resource:body'=>' %s add a resource(%s) in your project(%s).',
  'backup:important:content'=>'The amount you pay will reduce your money first. If the project get 100%, then he can get your donation money, if not, the money will return to your creabator bank account and you could use it to support the other projects.',
  'admin:menu:frozen'=>"Frozen&Refresh",
  'admin:menu:recommened'=>"Recommened",
  'admin:menu:finish'=>"Finish Projects",
  'not project'=>"It's not a project.",
  'not project blog'=>"It's not a blog post ,please check and try again later",
  'projects:widget:workonissues'=>'Issues working on',
  'projects:issue:none'=>'He do not working on any issue at this time.',
  'projects:issue:widget:undone'=>'The issue he is working on do not finish yet.',

wiki:

  'wiki:all' => "All Top-level wiki",
  'wiki:none' => 'No wiki page yet',
```