Completely overhauled styling(and much of the markup)

- Moved styling out of application.css manifest o_o
- 'base' houses basic element styling and skinned components(e.g,
  buttons); 'application' for now is a bit heavy and contains
  'page-specific' styling(this may change)
- ...removed bootstrap

What remains:
- Will go back and do responsive stuff later
- Will restore the main error styling later
- Would like a confirmation page after submission
- Etc.
Added submission confirmation page
Submission form niceties and added FontAwesome

- Nicer validation failure styling
- Added a hint for image upload field
Overhauled apps/show

- Also cleaned up some base styling
Changed manifest css to not load every stylesheet in existence
DatApp 'rebrand' and assorted copy updates
Re-thinking of apps/show header styling

Also:
- Some approximations made for .app-image and .visit-app;
  will revisit later
- Renamed .submit-app to .app-submit(going with a loose
  resource-action class naming)
- Darkened .hint-text color a bit
Adjacent paragraph-anchor in pitch text

Also fixed ye olde clearfix class
Removed crufty AppsController code :)

No longer need this commented-out redirect from create->show
Merge pull request #1 from csampson/redesign

UI overhaul
Added bourbon, addressed use of box-sizing

- I'd like to avoid vendor prefixing here and going forward
- Introduction of bourbon involves changing the manifest file
  accordingly
- Lastly, moved google font loading out of import
Merge pull request #8 from csampson/issue/2

Added bourbon, addressed use of box-sizing
change button
Merge pull request #9 from bhelx/change_twitter_link

change button
remove extra thumb
initial try, need to test
correct english
Merge pull request #10 from bhelx/user_submission_email

User submission email
Fixed typo in app submission page

Correctly reads 'Tell us about your dat big fine app of yours'
Merge pull request #12 from csampson/issue/11

Fixed typo in app submission page