Update README.md

#### Introduction

nested (now also called TE-greedy) is software to analyze nested LTR transposable elements 

in DNA sequences, such as reference genomes. It is made of two components: nested-generator 

for generating simulated sequences of nested retrotransposons, and nested-nester (now called 

TE-greedy-nester) that looks for nested, as well as non-nested and solo-LTR repeat sequences 

in the input. Unlike other similar software, TE-greedy-nester is structure-based by using 

de-novo retrotransposon identification software LTR Finder, relying on sequence information 

*nested* (now also called *TE-greedy*) is software to analyze nested LTR transposable elements 

in DNA sequences, such as reference genomes. It is made of two components: *nested-generator* 

for generating simulated sequences of nested retrotransposons, and *nested-nester* (now called 

*TE-greedy-nester*) that looks for nested, as well as non-nested and solo-LTR repeat sequences 

in the input. Unlike other similar software, *TE-greedy-nester* is structure-based by using 

de-novo retrotransposon identification software *LTR Finder*, relying on sequence information 

only secondarily.

#### External tools