Adds more idetools suggest failure cases.
Forces removal of nimcache dir for all caas runs.

Now some test cases fail because they can't use a previous nimcache
directory (which potentially could have wrong compiled code anyway).
Adds caas and idetools keywords to The One And Only Great Index.
Mentions expected order of idetools suggest results.
Moves caasdriver comments into idetools document.
Documents idetools skLabel with failure test case.
Documents idetools skMacro with failure test case.
Adds idetools failure case for re"" being reported as a module.
Merge pull request #515 from gradha/pr_idetools_improvements

Idetools improvements