First pass at adding infinite scroll lib.
Initial pass for left filter container.
Add the functionality to hide and show the filter container based on current page.
Changed default values for filter container.
Merge branch 'develop' of https://github.com/ALE-Team/ale-prototype into research/filter-container

* 'develop' of https://github.com/ALE-Team/ale-prototype:
  update addBoard to flush the pins attribute when creating new boards, will have a better fix when a real data API is in place
  Temporary solution for scrolling after closing stacked modals.
  update addBoard to also add the new board model to the allBoards collection
  set boardId by using allBoards for board count
  clean up unused function from bug fix
  add modal-open class back on body element after stacked modal closes and bootstrap removes the class
Reenable infinite scrolling on home page.
Bring footer buttons to top and add background color.
Add dummy formatting and options to filter container.
Add responsive css for more columns.
updated json for more relevant images and articles
resolve merge conflicts with develop branch
Merge branch 'develop' of https://github.com/ALE-Team/ale-prototype into research/filter-container

* 'develop' of https://github.com/ALE-Team/ale-prototype:
  hotfix - resolve error when trying to split url params that don't exist
Change styles to left container.
Update from Option to Source in sidebar.
Merge pull request #18 from ALE-Team/story/ALE-161/filter-sidebar

story/ALE-161/filter-sidebar
Merging left-container from develop