Add an option to "ignore comments" to rule c101

Better handling of invalid .ficfg files

[W504] not detected when class is declared in the implementation part

[C108] "Nested With ..." does not detect some cases

[W527] False positive

Suggestion [Wxxx] "Format parameters have wrong type"

[W507] Regression from 2015.11upd2 to 2015.11upd6

[W528] False positive when using for.. in

New warning "Parameter <xxx> is passed to method but never used"

[C110] Regression from 2015.11upd2 to 2015.11upd6