feature/Page content type updates: default settings, Panelizer defaults and adding image and tag fields

## Ready State: (No)

This pull request is related to the following JIRA tickets: [ICS-120 Create basic page content type](https://imagex.atlassian.net/browse/ICS-120).

## Requirements & Dependencies

* This module requires the following variable be set in imagex_panels first: page_manager_node_view_disabled : 0. This is being set in imagex_panels and will be available once this pull request is merged https://github.com/imagex/imagex_panels/pull/1
* As a result, this also requires that imagex_panels be included in installkit, which is also in a pull request: https://github.com/imagex/imagex_installkit/pull/58
* Also depends on this PR where this feature needs Parrot to be the default theme as the changes in this PR uses Panel layouts from Parrot. https://github.com/imagex/imagex_installkit/pull/57

## Deployment Instructions

* Merge code.
* Revert features
* Clear caches with `drush cc all`

## Usage/Test Instructions

- updated Panelizer view modes and default Panel Panes based on Parrot layout.
- updated Page content type settings: description, scheduler, workbench moderation
- updated Page fields: adding image fields and tags + reordering.

### 2nd commit

- updating imagex_page dependency on imagex_panels and removing allowed content overrides in favor of depending on Panels defaults in iamgex_panels