'addEmptySectionToForm'
'moveSectionTo'
'removeSection'
data-parent_selector for accordion-like group management fixed
onSectionClick implemented
onFieldClick initial commit
onFieldClick realization, first part of moveElementTo
indexes reordering
row change implemented
Tests implementation.
New tests
Merge branch 'forms-api-without-angularjs'

Conflicts:
	app.js
	index.html