truncate zendesk data to respect Field max_length param

some zendesk data like Forum descriptions can be lengthy and exceed the max_length defined in askbot for the mapped field. This is a brute force truncation at max_length.
fix errors caused by user names with unicode data
Merge pull request #126 from kporangehat/zendesk_truncate_fields

truncate zendesk data to respect Field max_length param
Merge pull request #127 from kporangehat/unicode_fixes

fix errors caused by user names with unicode data
a minor css fix