* Added variable s:vim_cstmztn_files_dir which points to the directory containing all the files that customize a plain vanilla Vim installation for my needs.
* Added the newly created 'sibinpthomas/vim_personal_xtra' bundle to the list of bundles to be installed. This bundle contains all the miscellaneous things required for proper customization which require personal maintenance. This bundle contains Man pages and OS abstraction related files as of now.