refactor(run.sh): Combined run and build scripts
fix(Dockerfile): Removed unnecessary PPA
fix(Dockerfile): Removed duplicate curl package
chore(Readme.md): Update documentation
Fix some typos
Remove unused software-properties-common, replace git-core with git
Use Java 7
Move environment variables to /etc/env-android.sh
Use ccache (really)
Add ccache to .gitignore
Always use bash for run.sh
Print a message before building the image
Add .dockerignore