Experimentation trying to set the nobackup and noswap options.
Add noswapfile and nobackup options when invoking vim.
Experiment on setting working directory for the editor.
Add custom vimrc file and modify environment so that we load our vimrc
file, load a vimrc file in the user home directory and then modify
options after loading the user vimrc file.
Remove editor options which have been migrated to the custom vimrc file.