Ship the jinja themes with Nikola and make Jinja a first-class citizen.

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
Move jinjify from the themes repo.

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
Add newlines in jinify output, map parents properly

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