v2.3.1.2

Fix row copying. Reference types referred to the same reference after…

Update fork

Merge branch 'v2.2.2' into v2.3.0

# Conflicts:
#	calc.go
#	calc_test.go
#	cell.go
#	cell_test.go
#	col.go
#	lib.go
#	lib_test.go
#	rows.go
#	table.go
#	xmlSharedStrings.go

Add different pivot table options

v2.2.1

Add different pivot options