update the tutorial for running RIMA on Kraken

Author: Lin Yang

README.md

@@ -1,2 +1,12 @@
+For those who want to run RIMA on Kraken, first, use the following code to activate the RIMA environment on Kraken:
+
+export CONDA_ROOT=/liulab/linyang/rnaseq_env/miniconda3
+export PATH=/liulab/linyang/rnaseq_env/miniconda3/bin:$PATH
+source activate /liulab/linyang/rnaseq_env/miniconda3/envs/rnaseq
+
+
+then follow RIMA tutorial start from chapter 2.3:
+https://liulab-dfci.github.io/RIMA/
+
 Please refer to  https://liulab-dfci.github.io/RIMA/