4.0.1: Optimizing install script and Bug fix

1. Optimizing the install script.

   Use the url of dymanic install script is not secutiry, so I manual handle it.

2. Fix typo path of install script.

3. Example:

   [ jonny@gundam ~/vcs/vimrc ] (develop) - 10:45
   $ time make install
   ==> Copy vimrc ...
   cat _vimrc  > /Users/jonny/.vimrc
   cat _gvimrc > /Users/jonny/.gvimrc
   cp -a _vim/   /Users/jonny/.vim
   ==> Install dein.vim ...
   mkdir -p ~/.vim/bundle/repos/github.com/Shougo/dein.vim
   git clone https://github.com/Shougo/dein.vim ~/.vim/bundle/repos/github.com/Shougo/dein.vim
   Cloning into '/Users/jonny/.vim/bundle/repos/github.com/Shougo/dein.vim'...
   remote: Counting objects: 4810, done.
   remote: Compressing objects: 100% (18/18), done.
   remote: Total 4810 (delta 14), reused 20 (delta 11), pack-reused 4781
   Receiving objects: 100% (4810/4810), 930.41 KiB | 846.00 KiB/s, done.
   Resolving deltas: 100% (2742/2742), done.
   ==> Install plugins ...
   vim -c "try | call dein#install() | finally | qall! | endtry" -Ne
   ==> Done.
   
   real    2m35.850s
   user    1m36.400s
   sys     0m22.555s