SEO fixes for MetaTitle and MetaDescription

When running SEO analysis (using the microsoft SEO optimisation toolkit or other tools)  on a site with active forums, this come up a lot (for nearly every topic).

For SEO purposes

MetaTitle should exceed 65 characters.
MetaDescription should not exceed 150 characters.

This pull request truncates the MetaTitle and MetaDescription at the last whole word before the max length. Not sure if this is the best option, I thought about using an elipse (...) but that would probably mess up SEO just as much.