Create new file - tsv_import.py
Fix adding unneeded tab in end of every line vk.py
Add get_fields function
Add function for parsing tsv file
tsv_import.py: add main code for parsing argv file
Add function for converting tsv lists to dicts
Modify tsv_import's main to print resulting dicts
Add identity_or_none function
Fix identity_or_none function
Add str to int converter
Add identity function
In tsv_import main use identity_or_none
Correct conversion functions in tsv_import's main
tsv_import: move conversion_functions out of main