moving introduction to tools
Merge pull request #21 from ropensci/gh-pages-ciera

moving introduction to tools
removed files from _posts
added a place holder post in _posts incase we want to add a blog-like section later
modified default layout to not show
_posts
re-ordered content
updated format of references sections
Merge pull request #24 from iamciera/gh-pages

Fixed a lot of structure and tiny formatting.
Merge branch 'gh-pages' of https://github.com/jhollist/reproducibility-guide into gh-pages