Fix wrong model recognition

Parser was recognizing words with `model` keyword combination, for example `` `model` `` or `Cmodel`, as model, this is a suggestion to fix the issue. this has been mentioned in both issue #152 and #92.
so this is just to do an if pd.sectionContext() is ModelSectionType or ModelBodySectionType bellow? I do not think you should need this boolean here at all