Exclude test config

[jonfox]

Currently when project dependencies are worked out in a multi-project build, there is no check to ensure that we are only including projects with a compile dependency, i.e. those with .dependsOn(module1) or .dependsOn(module1, "compile->...")

This fixes that issue and filters out projects that don't have compile dependencies. I think this is what is being referred to in issue #142

There was also a problem with the build, sbt would throw on startup. This is fixed in the first commit.

[jonfox]

Also it looks like Travis has not been building for a while: https://travis-ci.org/xerial/sbt-pack/builds

[xerial]

Thanks for the fix. I guess you copied a test case from the other test. To make it easy to understand, I'd like to simplify it (by using a single dependency).

If this is fixed, it's ok to merge. I'll check travis ci configuration later.

[jonfox]

I have also updated the fix build commit as I had problems when I hooked my fork up to Travis:

• it looks like the .travis.yml schema has changed and the existing file was invalid
• the Oracle JDK 8 is no longer available on Travis so I switched to OpenJDK
• I updated paulp's sbt script
• the previous Travis config was not in fact building against sbt 0.13, rather it was just using the build.properties version. When I tried to use -sbt-version with 0.13 I got errors due to current versions of some sbt plugins not being published for 0.13, so am just using the build.properties version now

This seems to have kicked off a Travis build on this repo which looks like it's passed now.

[xerial]

LGTM. Thanks for the contribution!