Corrected error in user manual. WMS Basics section incorrectly specifies
WMS version 1.1.1 instead of 1.3.0 in example request. (Example shows
different axis order between 1.1.1 and 1.3, but passes version 1.1.1
in both requests.)
Merge pull request #729 from parkerabercrombie/fix_user_manual_wms_1_3_axis_order

Corrected error in user manual