There was some hiccups migrating from distutils to setuptools that resulted in a few files being missed from the tarball

Fixed bugs:

• config settings lost when I cancel "Close multiple terminals" dialog #210

Closed issues:

• Feature Suggestion: Splitted screen shells based on parent #230
• Release 2.0 does not have signed assets #228
• Some files install to the wrong location #227
• Multi tab breaks transparent background #225

Merged pull requests:

• make sure data/*.in files are there for distributors #237 (mattrose)
• only set clear background when background_image in config #233 (mattrose)
• fix INSTALL instructions for setuptools #232 (mattrose)