[vim] Use Vundle to manage cscope_maps

Signed-off-by: Han-Pei Lin <aeglos.tw@gmail.com>
[vim] Remove unused plugin Align

Signed-off-by: Han-Pei Lin <aeglos.tw@gmail.com>
[vim] Remove NERD_tree, and use Vundle to manage QuickBuf

Signed-off-by: Han-Pei Lin <aeglos.tw@gmail.com>