Fixed bug: global svg variable

Fixed bug where where global svg variable wasn't populated correctly
Added extra debug info
Merge branch 'master' of https://github.com/RefactoringTools/devo
updated to work with the lastest cowboy.
unregister devo_sampling first.
Merge branch 'master' of github.com:RefactoringTools/devo
updated
some new files.
deleted
updated
updated.
Fixed bug: Config node names

S_group config node names had leading spaces. This is ignored when
creating nodes names in the JS
Merge branch 'master' of https://github.com/RefactoringTools/devo