title: Error in deleting/addind file from appharbor using git "Unable to create 'f:/git/xyz/WorkerProcess/.git/index.lock': File exists"
body: <p>I want delete bin[or trying to run $git add .] from local git hub folder as well as on hosted app-harbor folder but i am unable to delete folder and getting following error  </p>
  
  <pre><code> $ git rm -r bin [ $ git rm -f bin]
   fatal: Unable to create 'f:/git/xyz/WorkerProcess/.git/index.lock': File
   exists.
  
  If no other git process is currently running, this probably means a
  git process crashed in this repository earlier. Make sure no other git
  process is running and remove the file manually to continue.
  </code></pre>