Hotfixes/sxssf xlsx

Hello~

Firstly, It might sound strange to make Excel files whose rows are hundreds of thousands though.
Anyway, I tried to make xls files whose rows are more than 64k and figured out that Excel 2007(.xlsx) could support more than 64k rows. When I made a large xlsx file, it became very slow to produce a final result file because the plugin created and reloaded local xls files again and again. So I changed to use SXSSF in place of HSSF, which is a memory-consuming DOM model, to write out Excel data.
By the way, I had to put dependencies for a bunch of related jars in pom.xml.

Thank you.