Move styleguide installation into install task

- Updated USAGE for change in task name for install
- Output USAGE info at the end of install
Merge pull request #12 from mathias/break_out_install_task

Move styleguide installation into install task
Add gem name to the README
Fix name of generator

`rails g styleguide:install` doesn't exist. `rails g styleguide` does.
Merge pull request #14 from devn/master

Fix some issues in the README
Fix readme, bump version
Changes images sources of Readme to absolute urls.
Changes images sources of Readme to new style relative urls.
Merge pull request #18 from Applicat/patch-1

Changes images sources of Readme to absolute urls.
Improve Readbility of Widget Sections and UI
Merge pull request #19 from bigtiger/master

Widget "Title_now_improved"
Make borders widget less obtrusive
Remove color from widget headers
Default to Helvetica on Macs, Arial on MS
Adjust iphone viewport. Fixes #24
Merge pull request #20 from bigtiger/master

Clean-up display, avoid style conflicts
Bump version
Update styleguide_controller.rb
Merge pull request #39 from davidlegendmc/master

Fixed ruby 1.8.7 syntax error in StyleguideController
Basic width-selecting functionality

- show/hide on the width options
- clicking an option sets the width on all preview elements
- selected class is set on clicked option
- Closes #30