Refined project build.
Renamed project files to coincede with project names.

Added developers clause.
Bumped sbt version, bumped library dependencies version.

Removed commons from the dependencies.

Core and http are now considered modules and are not individualy
published. They are instead added to the sources of project http-android-transport
and http-java-transport. Which are then published under the names dsl-client-http(-java).

Rewrote transport to use javas URL.

Added AnyTransport which will read multipe urls from project settings, if they are provided, and try them all once until first succeeds, or throw an exception if all fail.