Put all dotfiles into one "stow package"

This makes installation a lot easier, as we just need to type:

    stow -v dotfiles

instead of installing multiple packages and risking to forget something.

.gitignore

@@ -1,3 +1,3 @@
-vim/.vim/bundle/
-vim/.vim/.netrwhist
-vim/.vim/viminfo
+dotfiles/.vim/bundle/
+dotfiles/.vim/.netrwhist
+dotfiles/.vim/viminfo

README.md

@@ -3,9 +3,9 @@
 Install using GNU `stow`:
 
 ```bash
-    cd ~
+    cd
     git clone git@git.schauenburg.me:fernando/dotfiles.git .dotfiles
     cd .dotfiles
-    stow bash # (and/or bin, dircolors, git, ...)
+    stow dotfiles
 ```