getopts repair; now -c for cleaning; invalid options exception
this code is released under MIT license
echo output stylistic correction
all input-mediate files now in variables
comented some unused variables to get rid of some shellcheck warnings
serp files clean command (-c) debugged
comments refining; functions echo @ begin
comments refining;
copyright notice correction
echo should use single quotes for simple strings?
clean function now can also remove queries file
added confirmations after each function for continue
added confirmations after each function for continue
notification moved
input file queries.txt -> queries
query preparation function now removes all empty lines; tr is now not used

Conflicts:
	queries
syntactical errors removed from queries list
clean function should return 0 on correct execution
corrected use of double quotes