hella bug fixes

Subscriptions block on nav panel links to boards not subscriptions,
links be for entire block, not just text, Javascript validation before
submitting, Update photo button breaks if there is no image selected -
make this javascript and fix server side, On comments, line breaks show
up with a <br /> tag, When you choose a file for comments, you do not
see if one has been selected, Check what happens when the boards,
subscriptions, or discover blocks have large number of elements in them.