new release of xlights user manual v1.2

[smeighan]

new user manual version 1.2 posted on xlights releases page.
http://nutcracker123.com/nutcracker/releases/XL4UserManual_v1.2.pdf


this manual went from 7 mbytes to 14 mbytes, and from 150 to 173 pages in length


thanks to all the authors!