Add argument parser

Some uses was added in main.py
Add read separation into groups: VH, VL, VK

This separation is without VHH group.
Add some requirements

BioPython only
Add config file

Config file in .json format
Commented unnecessary methods in alignment.py

get_consensus and align_miscle don't wort yet...
Added return in separate

Function split(config, fasta) return dictionary with splited fasta
Added detection VHH sequences

VHH sequences are determinated by the regular expression.
Write grouped fasta on disk

Fasta file with grouped sequences is writing after separation.