Added content and some use instructions to README.md

README.md

+This project contains scripts to build softwares using EasyBuild.
+
+Instructions to use:
+
+build_software_rc-build_user:
+
+1. Make a directory for your software build project.
+1. Generate a list of eb files and copy it to a file(INPUT_FILE).
+2. Clone this repository in that folder. 
+3. Go to the bin directory and run: ./build_software_rc-build_user INPUT_FILE