Using nested syntax in most application.conf examples (#48)
Fixed nested syntax inconsistency (#48)
Updated inference_rule typos
Merge branch 'wip-gh-pages-nested-syntax' of https://github.com/netj/deepdive into netj-wip-gh-pages-nested-syntax

Conflicts:
	doc/inference_rules.md
	doc/walkthrough.md
Merge branch 'netj-wip-gh-pages-nested-syntax' into gh-pages