URL Field jQuery plugin

- Removed unnecessary URL field CSS
- URL field jQuery plugin code
- URL Field jQuery e2e test HTML
- Some initial URL Field jQuery e2e tests
Merge pull request #30 from stulees/master

URL Field jQuery plugin
e2e tests for URL Field component

- Testing initialized state
- Testing entering a valid URL and validating
- Testing entering an invalid URL and validating
- Testing unchecking the 'Validate URL' checkbox with an invalid URL and validating
- Testing checking the 'Validate URL' checkbox with an invalid URL and validating
Merge pull request #31 from stulees/master

e2e tests for URL Field component
Angular directive to wrap URL Field jQuery plugin

- Two-way binding for "url" property
- Watching for scope changes on url to have jquery plugin set new url value
- Scope listening for "collectAdditionalParams" to update scope value of url from jquery plugin (provided it passes validation)
Merge pull request #32 from stulees/master

Angular directive to wrap URL Field jQuery plugin