#Important cases:
##1 ProKeys assumes that the data being imported has no duplicates inside itself.
##2
Assume duplicate snippets snp, one present inside fld, the other being imported and under Snippets.
Now, when we choose to keep the imported snippets in case of duplicates, the resultant snip snp will be present under Snippets (and not under
fld, as was the initial case)
Why this happens? ProKeys cannot judge where a user might want to place his snip. Imagine if the imported snip was under fld and
the existing snip under Snippets, then the user might want to let snp remain at its place under fld.
Hence, ProKeys preserves the position of the snippets that are kept.