Update iMRMC.R to allow users to input fileName or data frame.

[qigongFDA]

• Running tests was peculiar.
  • When sourcing and using package, the jar file was in the "java" directory
  • When tests were run automatically, the jar file was in the "inst/java" directory Add test_doIMRMCfromFile.R to verify that users can input fileName to doIMRMC Add some data for the tests I moved some functions to the utils.R file Minor changes to documentation