update AGOTUI citation

Author: svm-zhang

README.md

@@ -48,11 +48,13 @@ AGOUTI uses paired-end RNA-seq reads to guide genome scaffolding and improve gen
 
 ## Cite AGOUTI
 
-**AGOUTI has been accepted on GigaScience. We will update the citation info soon.**
+AGOUTI is published here:
 
-A preprint of our manuscript provides details of how AGOUTI works. For now please cite AGOUTI using the following format.
+http://gigascience.biomedcentral.com/articles/10.1186/s13742-016-0136-3
 
-Zhang, S. V, Zhuo, L., & Hahn, M. W. (2015). AGOUTI: improving genome assembly and annotation using transcriptome data. *bioRxiv*. doi: http://dx.doi.org/10.1101/033019
+Please cite AGOUTI using the following format:
+
+Zhang, S. V, Zhuo, L., & Hahn, M. W. (2016). AGOUTI: improving genome assembly and annotation using transcriptome data. GigaScience, 5(1), 1.12. doi:10.1186/s13742-016-0136-3
 
 ## Obtain AGOUTI