phasing out app.user() for app.currentUser

pjax clicking on nav arrows; move author header into backbone land; comment out comment form for now

the previous and next posts are now supplied in json of the presenter; give the template creator a default value

 - apply the padding to the wrapper element, not to the textarea
   apparently padding a textarea makes it shrink in firefox... ?
 - don't use manual padding, instead specify max-height for images
   extra-huge images are jolted, but they don't explode the layout
 - closing handled by view,
   gets rid of "Publisher.close is not a function" error msg

it auto-expands to the size of the text that was selected
it self-closes after posting again

Revert "swap pin for heart [ci skip]"

This reverts commit 488e064e.

Conflicts:

	app/views/templates/likes_info.jst

Revert "reference pin icon in mobile view [ci skip]"

This reverts commit 9377dd30.

Revert "first pass at strickly user level rename from like => pin. still need to update assets"

This reverts commit d06ccb9b.

Conflicts:

	config/locales/diaspora/en.yml

add heart icon back