add logic to only have one version of an item.  append new tags and categories to original version of an item.
Merge branch 'master' of https://github.com/ReadUpCode/readup
add logic to register an upvote for any item submitted more than once
Merge branch 'master' of https://github.com/ReadUpCode/readup
cast an upvote for the user who posted the item
Merge branch 'master' of https://github.com/ReadUpCode/readup
Merge branch 'master' of https://github.com/DougKong/readup
clean up code by making functions for adding tags and categories to an item
Merge branch 'master' of https://github.com/ReadUpCode/readup
Merge branch 'master' of https://github.com/ReadUpCode/readup
getting upstream changes
Merge branch 'master' of https://github.com/ReadUpCode/readup
Merge pull request #71 from DougKong/master

add logic to keep each item unique.  all tags, categories and votes will be tied to that unique item.
Merge pull request #75 from bwest87/newTagStyles

New styling and behavior for adding links. Other styling/behavior fixes.
displayFrame directive being cleaned
attempting to clean up top bar in login area
styling headings to change size on resize
pull out environment variables.  add in host to mysql session store.
working on tag view
Merge branch 'master' of https://github.com/ReadUpCode/readup
items controller now pushes to s3, need ENV variables for this to work on other machines