cleanup: remove unused CSS files
hradmins/show: fix typo
(design) various UX/UI improvements (stylesheets, files, stuff)

OVERALL LAYOUT
- update main site CSS (application.css) to NOT include all files
  in the CSS tree.  Only include the ones that we want.
- add in design elements from TotalHIPAA.com (WP site)
  - add CSS and image assets
  - add background to main layout
  - add container border shadow to main layout
  - grab inline CSS elements from TotalHIPAA.com (WP site)
  - add in footer from TotalHIPAA.com (WP site)
    - fix footer: remove portions of the footer that we're not using,
      fix link back to the top of the page
  - fix email address in footer
  - remove elements from reset.css that we don't want
- standardize main layout to only have a single .container DIV
  (not multiple)
- add L/R padding inside of .container
- make sure the navbar and the footerbar stretch all the way to
  the left and right boundaries of the container anyhow (ignoring
  the new padding)
- add space above footer
- fix all ERBs with container > row > span. We're using Twitter Bootstrap,
  so we need to make sure that our ERBs render consistent code.  In general,
  our pages should have
      - one .container DIV (in the layout)
         - any number of .row DIVs
            - any number of .span* DIVs
  For layout concerns, it's pretty important that we adhere to this
  convention.
- fix HTML Title capitalization (Hipaa -> HIPAA)

HEADER/TOPNAV
- DRY up the header nav
- topnav - fix logo alt text, fix rendered whitespace inside link
- show navbar line even if user is logged out
  (it's an empty navbar in this case, but it adds a nice visual)
- DRY up top nav menu (in application layout)
  - some side effects (which hopefully will not be problems):
    - if a user is logged in but does not have "admin", "hradmin", or
      "trainee" set, user will still see "Home" and "Logout" buttons
    - admin users will now have "Home" button
    - admin users now have nav in .container-fluid like the other
      users always had
- make sure that only 1 "Edit Profile" link appears at the top of the page
- fix last_login to show prior login time (not current login time)

OTHER THINGS
- fix and DRY up home pages for trainee and HR admin
- move password tooltip hint JS to login only
- add in greeting for admin user on admin home page
- clean up / DRY login form
  - move it to its own file
- show "100%" instead of "100 %"
- remove extra character after "Question" table header in admin questions
  view
- add "btn" class (styling) to "Next" button when taking a quiz/exam
- fix whitespace inside of link for magnifying glass link to view pass quiz
  results
- adjust "Your/Correct Answers" to be "Your/Correct Answer" if there's only
  a single answer
- make "(none)" appear under "Your/Correct Answers" if no answer was given
- make some buttons use "btn-primary" instead of "btn-success", make some
  cancel buttons omit "btn-primary" and "btn-success"
Merge pull request #20 from nmassey/new-skin

design refresh of "neo_phoenix" - initial phase