update TODO
Fix get_runtime_version in activate_license :(
Default SeparateAnonymousUsers to True

It seems there exist licenses in the wild which do not have this field
set at all. Default to true, which is also done by the Mendix Runtime
internally.
update CHANGES for 0.5.2
update TODO
Merge changes for 0.5.2 from branch 'develop'
set m2ee module version to 0.5.2