relative links #10

[johannesloetzsch]

required when served in a directory (instaed of webroot)

This fixes most of #10 and should not have any unintended side effects

[aarroyoc]

It doesn't work on the learn pages and in nested modules (think of http/http_open from Scryer's docs)

Edit: Ok, I didn't read that you are already aware of it in #10

[dougransom]

Is this going to be ever merged?

[dougransom]

Is this code even going to work if we have files with various depths from the root? my use case is probably same as everyone elses, no need to run a web server.

I have use for some thing like {{ page_path }} which could be used to locate the css, but also for adding a ` which prevents search engines from indexing sites other than the screr official documents site.