Merge remote-tracking branch 'origin/sdk_1.4-dev' into sdk_1.4
Add an XCTest target
Temporarily set the core submodule's URL to my repo
Tests for default service and discovery provider classes availability
Rename ConnectSDKTests => ConnectSDKDefaultPlatformsTests class
Create SSDPDiscoveryProviderTests with a few simple tests
Test of SSDP M-SEARCH request correctness
Test of SSDP delegate's discoveryProvider:didFindService: method
Test of SSDP delegate's discoveryProvider:didLoseService: method
Start and stop tests for ZeroConfDiscoveryProvider class
Add tests for ZeroConfDiscoveryProvider class
Add comments for test methods
Remove the Samsung-MultiScreen support for release 1.4.0
Merge branch 'sdk_1.4-dev' into sdk_1.4
ServiceDescription: rename macro PROP => STRING_PROPERTY
Update the core submodule after merging in tests
Merge in initial tests for the core
Updated steps to migrate in readme
Updated steps to migrate in readme
Updated google cast readme