Addded Diaspora::Likeable module.  Corrected the unique index for likes to include author_id; extracted before_save callback needed for tags into Diaspora::Taggable.

Revert "escape js in format_tags until I can think about whether we have an XSS problem in the morning"

This reverts commit 8af95909.

This reverts commit d2e26f69.

This reverts commit f85d5ad6, reversing
changes made to b8d70393.

hashtags module now in comments.  not sure how to pull back relevant posts on tags/show from here...

fix for public posts in development mode, in single process mode,  when your pod_url is still set to localhost

Take some stuff out of the travis run, I think we need to use headless instead of an explicit xvfb.  Turning off travis for now.