Typo
Merge pull request #71 from domesticmouse/patch-1

Typo
Update typecasts.md

Typos and grammar
Merge pull request #73 from jrenner/patch-1

Update typecasts.md
Another tweet.
minor correction to tweet text.
Kotlin for Android tutorial and images
Kotlin for Android tutorial and images
Kotlin for Android tutorial and images
Kotlin for Android tutorial and images
Kotlin for Android tutorial and images
Kotlin for Android tutorial and images
Kotlin for Android tutorial and images
Kotlin for Android tutorial and images
Fix typo.
Fix code formatting, markdown formatting, add descriptive text, unify caption style.
Typos corrected
Merge pull request #74 from philipto/master

Getting started with Android and Kotlin tutorial
First review of Android Tutorial
Added Android tutorial to navigation