Support for the callbackURL which depends on the organization selected by the user at run time.
Rename OAuthAuthorizeHandler.
Accomodate to latest API changes.
Rename desktop handler: OAuthAuthorizeHandler
Remove 'sharing' from approval marker (so will work even if approval url is ..../sharing/rest/oauth2/approval)
Merge pull request #87 from Esri/dom/OAuthSupportForOrgAtRuntime

Support for the callbackURL which depends on the organization selected by the user at run time