Bump version to 1.5

Signed-off-by: Michael LeCompte <michaelslec98@gmail.com>
Update vimrc: change order of mappings

Signed-off-by: Michael LeCompte <michaelslec98@gmail.com>
Update install.sh: remove rm -rf from backup function

Signed-off-by: Michael LeCompte <michaelslec98@gmail.com>