Frozen columns (selectType = row only)
Resolved rebase conflicts
Frozen columns (selectType = cell)
Merge branch 'frozen-columns'

Conflicts:
	dist/w2ui-dark.css
	dist/w2ui-dark.min.css
	dist/w2ui.css
	dist/w2ui.js
	dist/w2ui.min.css
	dist/w2ui.min.js
	src/w2grid.js
	test/grid.html