Add scripts, etc to enable building samples against a binary-release

Right now all of the sample jars are only built as part of building Edgent (a repo or source-release image). At least one sample, scenarios/iotp/range/scenario, uses pi4j-core.jar and the binary-release can't include the compiled sample – pi4j-core is LGPL and incompatible with ASF licensing.

The binary-release does include the sample src. It should also include scripts and Eclipse .project/.classpath to enable users to build the samples against a binary-release image.

Consider creating samples-source and samples-binary release jars and removing that content from the binary-release?