First commit
docs(script) : add documentation for the startup.R script
docs(scripts) add some documentation for scripts in /scripts/*
feat(script) create a function to add the jre the the JAVA_HOME

The JAVA_HOME have to point to the JRE for the rJava library. If it is not the case
a function will modify the JAVA_HOME in order to point to the JRE.
Merge branch 'master' of github.com:Twixer/workspace-r