Update Buildfiles and enable Travis-build

This also updates the dependencies because some older ones were causing
bugs in the build-process.
Add Gradle Wrapper

The Gradle-Wrapper is needed to ensure a specifig version of gradle.
Travis-CI uses Version 2.0 by default, but the current Android SDK
requires version 1.10

Also the gradle-wrapper makes it possible to start a build without
gradle beeing installed.
Move project-files to conform the default layout

This makes testing and configuration a lot easier
Fix lint-error in AndroidManifest.xml
Move files to fix IDE-Support

Also remove the gradle-support for IntelliJ because it's too old for
productive use.

The files have to move to a custom-location because Eclipse doesn't
support other paths.
Update README regarding the new src-folders
Merge pull request #11 from looperhacks/master

Reorganize project structure to enable Gradle-Builds