Adds an INJECTION to a given LOCATION for rendering. The INJECTION should be
a string which will always be added or a (string . lambda). In the latter case,
the lambda takes a single argument, a content object, i.e. a POST or INDEX, and
any return value other than nil indicates the injection should be added.

Load all content of the given CONTENT-TYPE from disk.

Load the user's config section corresponding to CONFIG-KEY, then
compile and deploy the blog.

The path to store OBJECT at once rendered.

Write pages to disk for all content of the given CONTENT-TYPE.

Render the given OBJECT to HTML.

Compile TEXT from the given FORMAT to HTML for display.