Bundle Update

https://www.pivotaltracker.com/story/show/74863314

#### Major Updates:
* **rspec:** 2.14 to 3.0
* **jquery-ui-rails:** 4.2.1 to 5.0.0
* **jwt:** 0.1.11 to 1.0.0
* **oauth2:** 0.9.3 to 1.0

#### Additions
* **rspec-its:** Allows "its(:attribute) { ... }" syntax in rspec 3

#### Pins
* "capybara", "2.3.0"
* "selenium-webdriver", "2.41.0"

These two updates broke confirm dialog acceptance and I couldn't find any documentation on why. I'll revisit this on the the next bundle update...

#### QA
- [x] Widget Update
- [x] Theme Update
- [x] Layout Update
- [x] Edit Page Settings
- [x] New Page
- [x] Add new widget
- [x] Edit existing widget
- [x] Page Preview
- [x] Change Layout
- [x] Change Theme