Merge pull request #23 from eheikes/fix-ul-attribs

Fix typo in OL attribute list.
Merge pull request #24 from eheikes/fix-spelling

Fix spelling typos in documentation.
Merge pull request eheikes-iframe-info.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	dist/html-inspector.js
Merge branch 'master' into hotfix-cross-origin-check