Add option to autoclose preview window after insertion.
Merge branch 'autoclose-preview-after-insertion'
Remove Vundle.
Install pathogen.
Install nerdtree.
Install YouCompleteMe.
Install vim-python-pep8-indent.
Remove broken vim-python-pep-indent.
Reinstall vim-python-pep8-indent.
Merge branch 'pathogen'

The vim-python-pep8-indent is not compatiable with Vundle. Use pathogen now.