Add minimal space management (get/create/delete).

Create and delete are restricted to current organization retrieved by
current space.
Space creation only support required parameters.
Get is not restricted.


This could be part of story Add APIsfor managing
spaces[https://www.pivotaltracker.com/story/show/53169449]
#242 syslog-drain-url is not set when assigning a user-provided services that requires this URL
Merge pull request #243 from loxal/feature/syslog-drain-url-support

#242 syslog-drain-url is not set when assigning a user-provided services...
Merge pull request #238 from Orange-OpenSource/master

Add minimal space management (get/create/delete).