Squashed 'app/' changes from 41ac784..01b8ef8

01b8ef8 Fixed readme formatting issued created on last commit
397bf87 Amended changelog formatting
2fadabe Updated README to include Changelog moving foward.
24c8410 Added JS cookie msg module + gov cookie message shared view

git-subtree-dir: app
git-subtree-split: 01b8ef80aff90551b5b41d7b20781cac5fd94cc0
Merge commit 'b291123f6745d483435022f59b036c407829eaac'