Merge pull request #5 from xzt41/master

update doc

Author: xzt41

README.rst

@@ -332,14 +332,14 @@ Xudong Xing (xudonxing_bioinf[at]sina.com)
 .. |PythonVersions| image:: https://img.shields.io/pypi/pyversions/RiboCode.svg?style=flat-square
    :target: https://pypi.python.org/pypi/RiboCode
 
-.. |BioConda| image:: https://img.shields.io/badge/install-bioconda-green.svg?style=flat-square
+.. |BioConda| image:: https://img.shields.io/badge/install-bioconda-blue.svg?style=flat-square
    :target: http://bioconda.github.io/recipes/ribocode/README.html
 
 .. |downloads| image:: https://anaconda.org/bioconda/ribocode/badges/downloads.svg
    :target: https://anaconda.org/bioconda/ribocode
 
-.. |Publish| image:: https://img.shields.io/badge/publish-biorxiv-orange.svg?style=flat-square
-   :target: https://www.biorxiv.org/content/early/2017/05/12/137216
+.. |Publish| image:: https://img.shields.io/badge/publish-NAR-blue.svg?style=flat-square
+   :target: https://doi.org/10.1093/nar/gky179
 
 .. |BuildStatus| image:: https://circleci.com/gh/xzt41/RiboCode.svg?style=svg
     :target: https://circleci.com/gh/xzt41/RiboCode