Fixed PHP notice: Indirect modification of overloaded property CRM_Volunteer_BAO_Project::$roles has no effect in CRM_Volunteer_Form_VolunteerSignUp->buildQuickForm().
Addressed API limit issue which limited display of needs on public sign-up form.
Merge pull request #217 from GinkgoFJG/bugfixes

Bugfixes for public volunteer sign up form.
Fixed volunteer role options URL which was broken by updated internationalization code.