Merge pull request #229 from ktf/revert-getParameterNames-changes

Revert "getParameterNames is really a const function"
getParameterSetNames is really a const function
Merge pull request #230 from wmtan/getParameterSetNamesIsReallyConstFunctionRedux

getParameterSetNames is really a const function
Revert "getParameterSetNames is really a const function"

This reverts commit 0b66b481fe846e5f5d7122c6fe329e73ff79b051.

Again... @Dr15Jones does not agree as suggested in #230, hence I
revert it.