refs #12: Headings are now a thing, at least in the simplest of cases.
refs #12: split headers work fine
refs #12: refactor parse_begin into smaller methods
Merge branch 'issue_8' into issue_12

Conflicts:
	pydocx/DocxParser.py
Merge branch 'master' into issue_12
refs #12: removed a commented out print statement
refs #12: name change and slight reorder
Merge pull request #12 from OpenScienceFramework/issue_12

Get headings working