First argument of org-element-headline-parser must be integer.
Fix #19
Refactoring
Merge branch 'for-newer-org' of github.com:kenbeese/org-gcal.el into kenbeese-for-newer-org

Conflicts:
	org-gcal.el
Merge pull request #20 from myuhe/kenbeese-for-newer-org

Kenbeese for newer org