work around section_5_4
implement section 6;
Merge branch 'master' of https://github.com/gregorytkach/page-proofs

Conflicts:
	.DS_Store
	.idea/workspace.xml
Merge branch 'master' of https://github.com/gregorytkach/page-proofs

Conflicts:
	.DS_Store
	.idea/workspace.xml
merge sections