New module with function to read NCBI Taxonomy files and identify a lineage and LCAs

Signed-off-by: Inti Pedroso <intipedroso@gmail.com>
Major changes
- Improved speed and robustness of matching taxids with GIs
- a few routines added to improve code

Signed-off-by: Inti Pedroso <intipedroso@gmail.com>
Files for Perl implementation removed

Signed-off-by: Inti Pedroso <intipedroso@gmail.com>
Major changes
Minor changes

Signed-off-by: Inti Pedroso <intipedroso@gmail.com>