vimrc.kk: rename .vimrc

Rename .vimrc to vimrc.kk and merge my own customize config.

Signed-off-by: Neil <freeordie.k@gmail.com>
Add git personal config file gitconfig.kk

Signed-off-by: Neil <freeordie.k@gmail.com>
bashrc.kk: add alias grep

Signed-off-by: Neil <freeordie.k@gmail.com>
bashrc.kk: update comment

Signed-off-by: Neil <freeordie.k@gmail.com>
Set EasyMotion_leader_key.

Signed-off-by: Neil <freeordie.k@gmail.com>