CMS-1742 Add type definitions for relationshipType_createOrUpdate in RemoteService.ts

Add strict typing for the parameter and result values of RemoteServiceInterface.relationshipType_createOrUpdate()

* Check the RpcHandler method in Java to find the exact values accepted and returned.
* Use optional types (optParam?: string) where appropriate.
* Avoid use of any as much as possible and use concrete types.
* Look at types of space_list() and space_get() for reference.
CMS-1793 Move events to the modules where they are fired from
Moved space events
CMS-1778 Create api.dom.BodyEl
Merge pull request #269 from enonic/CMS-1778

CMS-1778 Create api.dom.BodyEl
Merge pull request #266 from enonic/CMS-1742

CMS-1742 Add type definitions for relationshipType_createOrUpdate in Rem...
CMS-1737 Add type definitions for schema_list in RemoteService.ts
Merge pull request #270 from enonic/CMS-1737

CMS-1737 Add type definitions for schema_list in RemoteService.ts
CMS-1738 Add type definitions for mixin_get in RemoteService.ts
Merge pull request #271 from enonic/CMS-1738

CMS-1738 Add type definitions for mixin_get in RemoteService.ts
CMS-1739 Add type definitions for mixin_createOrUpdate in RemoteService.ts
Merge pull request #272 from enonic/CMS-1739

CMS-1739 Add type definitions for mixin_createOrUpdate in RemoteService....
Merge branch 'master' of github.com:enonic/wem-ce into CMS-1741

Conflicts:
	modules/wem-webapp/src/main/webapp/admin2/api/js/lib/RemoteService.ts