Update README

Author: Luca Denti

README.md

@@ -2,7 +2,7 @@
 
 Splicing Graph ALigner (SGAL) performs an accurate approximate mapping of RNA-seq reads against a graph representing the transcripts of a gene.
 
-This version is the one submitted to AlCoB 2017 (http://grammars.grlmc.com/AlCoB2017/).
+This version of the tool is the one submitted to AlCoB 2017 (http://grammars.grlmc.com/AlCoB2017/).
 
 ### Prerequisites
   * python3 (maybe also python is good enough but I didn't test it)
@@ -18,6 +18,6 @@ cd example/
 ./run genomic.fa annotation.gff rna_seqs.fa 3 5 gene out
 ```
 
-This version has been tested on 64bit Linux system.
+The tool has been tested only on 64bit Linux system.
 
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