add off xpath example
Add basis of execute_xpath_expr func
Realize execute_xpath_expr. Start to save output somewhere
+ Добавление либы libxml под виндой в pro-file
+ ActionChoose - не до конца
Nothing special.
Test output in console
Merge branch 'task_1' of github.com:smurav/db2013 into task_3
Finish @execute_xpath_expr. Output in console.