DESCRIPTION 

This is a general utility perl library for all kinds of hash routines. This mainly iterates hashes using the each builtin which is the fastest to do the job and like the list library uses refernces to avoid duplication whereever possible.

FUNCTIONS
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filter_multi($$$$) 
    This one is a full filter. This gets: 0. a hash. 1. whether to do filtering or not. 2. boolean indicating whether filter is negative or positive. 3. list of modules for filtering data. And does the entire filtering process in an efficient manner. 

filter_file_sing_regexp($$$) 
    This routine receives a hash and a regular expression and returns a hash containing only the elements in the hash which are pointers to files which contain a the regular expression. This also receives as the third variable whether to print the matched lines or not (this is passes along to Meta::Utils::File::File::check_sing_regexp). 
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