used more readable quotes strings
examples: changed CDN for netteForms.js
SelectBox: it is checked that value is non-empty only if selectbox has any options [Closes #5]
Forms: Selectbox allow item with null caption [ID => null]

Forms: test fix, test for ChoiseControl

Forms: Coding standard fix

NULL should be uppercase
Merge pull request #4 from simara-esports/master

Forms: Selectbox allow item with null caption [ID => null]
Revert "buttons and hidden fields are generated without HTML attribute ID. By default. (BC BREAK!)"

This reverts commit 1937a29f3200b6be9f6c7aed695eeafc75827a5d.
Revert "Forms: all validators and $defaultMessages moved to new class Nette\Forms\Validator (BC break if you are calling these methods directly)"
Revert "DefaultFormRenderer already does not modify the HTML class of controls. Classes are applied only when form is rendered. (BC break)"

This reverts commit bbc47eeef14389d71a42ffe5949120d677745d5a.