Revert getnikola/nikola#905

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
no background-color
modify warning

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
Update base-jinja

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
v7ify base-jinja

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>