Added finally clause to iso8859 and unicode methods.
Added finally clause to iso8859 and unicode methods.

My local changes created a bug that caused an exception to be thrown during the `normalize` call of
these methods, which then caused later tests to fail because the wrong decoding/encoding function
was being used.

astorije/URI.js,AndreSteenveld/URI.js,medialize/URI.js,svincent/URI.js,svincent/URI.js,GerHobbelt/URI.js,svincent/URI.js,danielweck/URI.js,medialize/URI.js,swelltt0576/URI.js,danielweck/URI.js,AndreSteenveld/URI.js,farmersweb/URI.js,chrismoulton/URI.js,chrismoulton/URI.js,astorije/URI.js,ilovezy/URI.js,GerHobbelt/URI.js,erpframework/URI.js,swelltt0576/URI.js,chrismoulton/URI.js,ilovezy/URI.js,ilovezy/URI.js,AndreSteenveld/URI.js,ASAPPinc/URI.js,farmersweb/URI.js,erpframework/URI.js,ASAPPinc/URI.js,farmersweb/URI.js,astorije/URI.js,erpframework/URI.js,danielweck/URI.js,ASAPPinc/URI.js,GerHobbelt/URI.js,medialize/URI.js,swelltt0576/URI.js