Update README.md

README.md

@@ -1,6 +1,6 @@
-`krust` is a [k-mer](https://en.wikipedia.org/wiki/K-mer) counter written in Rust and run from the command line that will output canonical k-mers and their frequency across the records in a fasta file. 
+`krust` is a [k-mer](https://en.wikipedia.org/wiki/K-mer) counter--a bioinformatics 101 tool for counting the frequency of substrings of length `k` within strings of DNA data. It's written in Rust and run from the command line. It takes a fasta file of DNA sequences and will output all canonical k-mers (the double helix means each k-mer has a [reverse complement](https://en.wikipedia.org/wiki/Complementarity_(molecular_biology)#DNA_and_RNA_base_pair_complementarity)) and their frequency across all records in the given fasta file. 
 
-Run `krust` on the test data in the [`krust` Github repo](https://github.com/suchapalaver/krust), searching for kmers of length 5, like this:  
+Run `krust` on the test data* in the [`krust` Github repo](https://github.com/suchapalaver/krust), searching for kmers of length 5, like this:  
 ```$ cargo run --release 5 cerevisae.pan.fa > output.tsv```  
 or, searching for kmers of length 21:  
 ```$ cargo run --release 21 cerevisae.pan.fa > output.tsv``` 
@@ -12,8 +12,6 @@ or, searching for kmers of length 21:
 ```(canonical k-mer}```  
 ...  
 
-`krust` uses [`rust-bio`](https://docs.rs/bio/0.38.0/bio/), [`rayon`](https://docs.rs/rayon/1.5.1/rayon/), and [`dashmap`](https://docs.rs/crate/dashmap/4.0.2).  
-
-Future:  
-A function like fn single_sequence_canonical_kmers(filepath: String, k: usize) {}    
-Would returns k-mer counts for individual sequences in a fasta file.     
+`krust` uses the [`rust-bio`](https://docs.rs/bio/0.38.0/bio/), [`rayon`](https://docs.rs/rayon/1.5.1/rayon/), and [`dashmap`](https://docs.rs/crate/dashmap/4.0.2) Rust libraries.  
+
+* Unusual, yes, to provide this data in the repo, but it's helped me spread word about what I'm doing.