help function rework

[luckyparkwood]

change help command with flags to only show the section of the tool it is run with

ex

dbntool show ?/help

show help section only for the show functions

[luckyparkwood]

added function _search_search in functions.cfg to enable contextual help commands added that as an option for all functions in dbntool control script

invoked by passing help after the major function

ex. dbntool add help