Merge branch 'app' into develop
Added more detail to layout/view slides
Added our apps and lesson footer link
Added download link in introduction and additional description tidyups
Added lesson export
Updated gradle
Merge branch 'feature/lesson-1' into develop
Merge branch 'app' into feature/lesson-2

Conflicts:
	BBCNews/gradle/wrapper/gradle-wrapper.properties
Added build of lesson 2
Added lesson 2 power point
Added lesson 2 exports
Merge branch 'feature/lesson-2' into develop
Added R.java slides
Updated exports
Merge branch 'hotfix/lesson-2'
Merge branch 'hotfix/lesson-2' into develop
Merge branch 'app' into feature/lesson-3
Added lesson 3 apk export
Added lesson 3 power point
Merge branch 'feature/lesson-3'