Activates Android build from Travis
Added missing "echo"  statement
- updated AndroidManifest.xml to match desired API values.
- removed CardEffect.cpp reference from Android.mk build file.
- added sdk.buildtools=18.1.1 line to default.properties and project.properties
- updated .gitignore
reverting sdk.buildtools change
Merge branch 'android_build_fix' into android-travis-ci
Added installation of 32 bits libs to make Android SDK work.
Merge pull request #570 from WagicProject/android-travis-ci

Android travis ci