put `.vimrc` into the `.vim` folder
Is it possible to put the .vimrc into the .vim folder so that I only have to sync the whole folder and not folder and file to other computers?
Starting in Vim 7.4 you can also just place a file vimrc into $HOME/.vim/vimrc or $HOME/vimfiles/vimrc for Windows and Vim will find it automatically.
Note, this is vimrc without a . (dot) or _ (underscore) like the traditional .vimrc/_vimrc file would have.
I keep my .vimrc in .vim and symlink it.
ln -s ~/.vim/.vimrc ~/.vimrc
On Windows I believe you can do the same with mklink.