Travis Support

Hello ! 
Here's the .travis.yml config for travis-ci.org support.
* you need to go to the [Travis website](https://travis-ci.org "Travis-CI"), and click on Sign in with github.
* Once you've linked your account, click on stulp->account, and turn on DmpBbo

Commit the pull request and it should start to build.

I also added a BUILD_SHARED_LIBS in the cmake config, to use like this -DBUILD_SHARED_LIBS=1 or TRUE, and updated the readme with the build status (mine, you'll have to change that).

Cheers,
Antoine