Switching to WPViewPager for potential previous page functionality.
Handling result of MediaSelectActivity in the Post editor.
Adding MediaUtils methods to retrieve MediaStore content.
Adding menu definition for media selection.

Gallery will be used to create a gallery out of the selected content.
Cancel will deselect all selected content without finishing the activity.
Added some resized assets from existing gallery_icon_circles asset for displaying as the Gallery icon.
Adjusting grid item layouts.
Implementing Parcelable on MediaContent types.

This will allow MediaContent to be serialized and returned as a result to the content selection activity.
Enabling content selection by using a CheckableFrameLayout.

Renaming MediaSelectFragmentPagerAdapter -> MediaContentFragmentPagerAdapter.
Removing MediaContentGridView as it was an unnecessary abstraction.
ActionMode now begins when an item is long-pressed. While active the user will have the option to deselect all items, confirm the selected items to be returned to the Post editor, or create a gallery (not implemented yet).
MediaSelectActivity now returns the results of the selection fragment. The Post editor displays the results in the post.
Selecting the capture photo icon will launch the Camera to get an image taken. Not fully implemented.

Coming up:
Working image capture
Support for web images (with progress indicator and background downloading)
Video content (capture, device, and web)