convertExceptionsToObject = function (exc) {
		var w = exc.split(', '),
			r = {},
			i, l, key;
		for (i = 0, l = w.length; i < l; i++) {
			key = w[i].replace(/-/g, '');
			if (!r.hasOwnProperty(key)) {
				r[key] = w[i];
			}
		}
		return r;
	}
@name Hyphenator-convertExceptionsToObject
@description
Converts a list of comma seprated exceptions to an object:
'Fortran,Hy-phen-a-tion' -> {'Fortran':'Fortran','Hyphenation':'Hy-phen-a-tion'}
@private
@param {string} exc a comma separated string of exceptions (without spaces)