changing font sizes on welcome tour
login screens
Sign release apk
removing caps
Merge pull request #323 from mapzen/ekta/login-refine-2

Ekta/login refine 2
Zipalign and auto-increment version code
Resetting version code to 0.6.0-SNAPSHOT to test automated release builds.
Merge pull request #324 from mapzen/chuck/sign-production-application

Sign production application
Update README.md

New path for install-dependencies.sh in setup instructions
Merge branch 'master' into ekta/login-refine-3
login screens