In ArrayConverter, the allowedChars array should (possibly) include the underscore character

An array value passed as:

this_is_my_first_value,this_is_my_second_value

should (could: please) result in a two-element array - currently the "_" is not recognized as a word character and thus results in the StreamTokenizer splitting each string at the underscore. Maybe ALL Java symbol characters should be recognized? This would avoid unnecessary quoting ala "this_is_my_first_value","this_is_my_second_value"

(note there is also a BUG related to this, since parsing the above string also results in an NPE in the current BETA- report to follow)