profile: move to main dir
style: social icons size change
style: responsiveness improvements.

* Replaces 'md' columns with 'xs'.
organize header and footer into separate files
index: content height fix

* Handles separately index content height due to a css inheritance bug for
  min-height(or my incompetence to understand css :) ).
  This is a temporary workaround, maybe it will become permanent if we don't
  handle big data :P
  For more info:
  https://bugs.webkit.org/show_bug.cgi?id=26559
  http://stackoverflow.com/questions/8468066/child-inside-parent-with-min-height-100-not-inheriting-height/8468131#8468131
browse_list: page to browse list of items

* Adds `browse_list` page with a static item (a book). The results are
  collapsable in categories using bootstrap's collapse.