Enable Travis-CI

Try Travis-CI [1] as a continuous integration.

[1] http://travis-ci.org/
[2] https://github.com/leviwilson/android-travis-ci-example
[3] http://levi-wilson.blogspot.com/2012/06/maven-android-travis-ci-and-more.html
Enable GUI to run integration tests

[1] http://about.travis-ci.org/docs/user/gui-and-headless-browsers/
Tweak default Travis CI's build lifecycle for Maven

- Don't do anything during 'install' step;
- Running 'mvn install' will compile sources, run unit and integration
  tests as defined by Maven's lifecycle.
Create AVD and start emulator with this device
List available Android targets and SDKs
Install more SDKs
Fix targets to install
Use 'pwd' to get the current directory
Reorder installation steps

List targets and SDKs and only after that try to install something.
Change target's id when creating AVD
Use numeric target id
Rename 'default-cli' AVD into 'Default'
Change filter
List targets and SDKs one more time after update
Change target's id one more time when creating AVD
Install ia32-libs package

Runtime libraries for the ia32/i386 architecture, configured for use
on an amd64 or ia64 Debian system running a 64-bit kernel.
Use apt-get instead of aptitude
Install aptitude
Skip 'apt-get update'
Back to apt-get install