Fixing issue where default route vanishes from controller on reboot.
Add webui saying changing network settings are not supported

This is still possible through the raw view, but there's no guarantee
things will work :-)
Merge pull request #239 from cdearborn/pull-req-release-roxy-master-21621ccb9cd2ab63811fbe42f4b4f6e2dbbd1d59

Merging fix for CES-1074: Default Gateway is not defined on the Nova-Controller [2/2]
Merge pull request #257 from vuntz/webui

Add webui saying changing network settings are not supported
Drop executable bits on files
Merge pull request #259 from vuntz/no+x

Drop executable bits on files