Vidjil parser, some improvements and fixes, Homebrew install

Improvements

• Allow to use Decontaminate based on read counts (old one was using clonotype fractions only)
• Proper normalization for Cdr3AAProfile routine in unweighted mode
• Add a parser for Vidjil software
• Add run script for compatibility with Homebrew (see our Tap)

Fixes

• Rare exception in Correct utility fixed
• ggplot2-2.x compatibility fix (guide keyword)