Added link to IDAM page where README referes to FICAM without explanation

Also:

* Diff was hard to view in standard 'git diff', so reformatted local bullet points to fall within 80 columns. (In retrospect, I could have just used 'git difftool' which I have set to use a nice GUI diff viewer.)
* Created a .gitignore file with entries so that git can ignore some of the temp files that get generated by my text editor.