fix for issue: Parser fails on inherit value #30 

Setting the Term on Property directly caused a failure when the Property finalizes. See the issue "Parser fails on inherit value #30" - https://github.com/TylerBrinks/ExCSS/issues/30. This change adds to the TermList where it will populate the Property's Term upon FinalizeProperty().
Merge pull request #31 from jaredgray/master

fix for issue: Parser fails on inherit value #30