Exporting cell-styles
Exporting table-template
To be able to map SwTableAutoFormat to table-template 1:1
extended table-template by the following elements:
	loext:first-row-even-column
	loext:last-row-even-column
	loext:first-row-end-column
	loext:first-row-start-column
	loext:last-row-end-column
	loext:last-row-start-column

Added attributes describing box format to SwXTextCellStyle

Change-Id: I2967ba461dfc6f030c1e5cdbba62e2673d3b232b
Reviewed-on: https://gerrit.libreoffice.org/26185Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>