made tab-delim txt file to internal struct funcs

made tab-delim txt file to internal struct funcs

i've created some functions that can be used for reading in a file, and
separating the fields into an array of strings held withing linked
lists, where there is one node per line.

this will be useful for reading in the search terms, which have two
fields, one being the url end for the entry, and the other being the
long-hand name.