Adjust post tab in anticipation of new icon.
New Post icons, updated tab bar alignments

First pass at new post icon. Includes -2px label alignment for other
tabs.
Changed tab order

Change tab order: Reader, Notifications, Me, Post
Code style and image naming conventions.
Merge branch 'issues/810-update-tab-icons' of github.com:wordpress-mobile/WordPress-iOS into issues/810-update-tab-icons
Merge branch 'develop' of github.com:wordpress-mobile/WordPress-iOS into issues/810-update-tab-icons
Updated tab bar icons

Properly weighed and aligned tab bar icons
Updated format toolbar bgcolor

Updated the background color to match the keyboard on both iPhone and
iPad with conditionals.
Fixed 1x Me tab icon
Merge branch 'develop' of github.com:wordpress-mobile/WordPress-iOS into issues/810-update-tab-icons
Merge branch 'issues/810-update-tab-icons' of github.com:wordpress-mobile/WordPress-iOS into issues/810-update-tab-icons
Adds keyboardColor to style guide. RGB vs hex.
Updated preview/media icons

Updated toolbar icons in post editor
Toolbar icons should be readGrey
Adding navbar dropdown graphic

Todo: use graphic. Align 4.0f from top (or, better, vertical center),
0f from right. Padding left & right for button: 22.0f (same as button
width). cc @astralbodies
Updating image preview icons/colors

Using same icons as in other views and same colors
Updating post editor placeholder colors

Boom! That took me a while but both fields now use the same default
placeholder text through attributedPlaceholder (iOS 6+).
Better tags placeholder

Updated tags placeholder and active text, copy, and the equivalent
styleguide colors (although the default doesn’t apply in the
styleguide, you have to color the placeholder in each instance
manually).
Toolbar-share icon, fixed media view

Added missing icon-toolbar-share.png icon to match toolbar sizes,
updated media detail view to match. All is now good.
Remove gap to the right of the preview label.