vim:.vimrc: Modify few keybindings
vim:.vimrc: Modify few keybindings

- map <space><space> to visual line
- map <leader>bb to last buffer
- Add function/macro to know highlight group of work under cursor
- enable cscope tags(don't know how to make it work)

Signed-off-by: Ratheesh S <f847af0ee3590f4912d169b886f309989d9e4c2e@gmail.com>
Tested-by: Ratheesh S <f847af0ee3590f4912d169b886f309989d9e4c2e@gmail.com>

ratheesh/dot-files,ratheesh/dot-files