Using new parser.
Merge remote-tracking branch 'origin/parser' into mrg_praser

Also brought in parse for github.com/noahcampbell/akebia

Conflicts:
	hugolib/page.go
	hugolib/page_test.go
Fix parsing edge case of frontmatter

When the frontmatter contains a - (or other delimiter) close to the
closing frontmatter delimiter, frontmatter detection would fail.
Add IsRenderable to Page

As pages are read from the target, they will be assessed if they should
be rendered or not.  The logic for IsRenderable is in the parser/page.go
and looks for anything exception '<'.
Add renderer information to --check

Now reports if the page will be rendered or not and by which render
engine.
More expressive --check output
Allow non-markdown content in content directory

Allow content that is not markdown and does not need to be rendered to
exists in the content directory.  Currently any valid html or xml
document can exist.  Templates are applied to these documents as well.
If you need to have content that doesn't have templates or AbsUrlify
like operations, then continue to put this content in static and it will
be copied over.