Add option group support to Select, improve theming

This release replaces react-select with react-select-plus to allow option group support to Select.

Select theming has also been improved to use Bootstrap classes instead of hard coded colors.

Correct Note date format

This release corrects the Note header date format to show correct day.

Fix Note Component 'Posted On' Date

This release fixes an issue in the Note component where the day in the 'Posted On' date was the day of the week rather than the day of the month. See #277 for details.

Allow React 15.6+ in using apps

This release moves react 15.4 dependencies to dev-dependencies to avoid restricting using apps.
Apps using react-gears should specify react and react-dom using v15.4 or higher

CurrencyInput, HMFAdd, doc updates

This release corrects issues in CurrencyInput #270 and HasManyFieldsAdd #272
Storybook has been updated to to improve documentation for Paginator and style overview and APM/Saffron 3 preview theme added

Update peer deps/remove deepClone

This release update deps and removes deepClone. See details in #252 & #267

Adjust DateInput tab behavior

This release modifies the DateInput tabindex behavior to make the input add-on button focusable , but not via sequential keyboard navigation to improve entry behavior.

Update DateInput

This release adds the following improvements to DateInput:

• Adds dateVisible prop to allow limiting visible/selectable dates
• Adds header and footer props to allow overriding defaults with custom components
• Add highlight style for today’s date

HasManyFields improvements

This release adds HasManyFields improvements:

• Adds disabled prop
• Adds onAdd, onRemove, and onUpdate prop callbacks
• Autofocuses added fields
• Updates visual style to closer match Saffron

Update Select styling

This release improves Select styling to better match Saffron and MyCase border styles and colors