Build: Check for new lines at end of file
Exclude external packages from style checks
Proper return value for checkstyle script
Style: fix new lines at end of file
fix run.sh disable-upnp option erroneously requiring an argument

Signed-off-by: Thomas Stilwell <stilwellt@openlabs.co>
Merge pull request #332 from benemorius/upnpswitch

fix run.sh disable-upnp option erroneously requiring an argument
Merge pull request #330 from dionyziz/new_line_style

Enforce new line at end of file.