Set the remote to github

Signed-off-by: Constantin Musca <constantin.musca@intel.com>
Remove projects which contain large files

Remove the eclipse-basebuilder and prebuilts/eclipse projects because
we cannot push files larger than 100MB.

Signed-off-by: Constantin Musca <constantin.musca@intel.com>
Adapt the manifest for Github

Signed-off-by: Constantin Musca <constantin.musca@intel.com>