Fix relative includes in Jinja extension

[Yoshi325]

Also fixes non-pug includes (they were being parsed as pug).

Issue #78

[kakulukia]

Hi @Yoshi325 ,

thanks for the PR! As i have nearly no time reviewing this, could you please also add a test case that can verify your changes?

Thanks already!

[Yoshi325]

I'll do my best!

[kakulukia]

Thanks!

[Yoshi325]

I am running into trouble following the README to run the testsuite. I see poetry artifacts in the project, but the makefile uses pipenv. Which of those tools to should I be trying to make work for me?

[kakulukia]

i obviously have to update this!
Please use those commands:

poetry install
make test

I just did a fresh checkout and this worked: 273 passed, 1 warning in 0.98s

[kakulukia]

Hey @Yoshi325 ,

did you continue on this PR? Id like to either merge or close it now as a lot of time has passed.

[Yoshi325]

Unfortunately this got too big for me to handle as it rippled out into the other exts.