(GH-39) Added new environment variables

- As per closed issue:
appveyor/ci#190

Author: Gary Ewan Park

BuildScripts/default.ps1

@@ -232,7 +232,9 @@ Task -Name __EchoAppVeyorEnvironmentVariables -Description $private -Action {
 		testEnvironmentVariable "APPVEYOR_REPO_COMMIT" $env:APPVEYOR_REPO_COMMIT;
 		testEnvironmentVariable "APPVEYOR_REPO_COMMIT_AUTHOR" $env:APPVEYOR_REPO_COMMIT_AUTHOR;
 		testEnvironmentVariable "APPVEYOR_REPO_COMMIT_TIMESTAMP" $env:APPVEYOR_REPO_COMMIT_TIMESTAMP;
-		testEnvironmentVariable "APPVEYOR_SCHEDULED_BUILD" $env:APPVEYOR_SCHEDULED_BUILD;
+		testEnvironmentVariable "APPVEYOR_SCHEDULED_BUILD" $env:APPVEYOR_SCHEDULED_BUILD;
+    testEnvironmentVariable "APPVEYOR_FORCED_BUILD" $env:APPVEYOR_FORCED_BUILD;
+    testEnvironmentVariable "APPVEYOR_RE_BUILD" $env:APPVEYOR_RE_BUILD;
 		testEnvironmentVariable "PLATFORM" $env:PLATFORM;
 		testEnvironmentVariable "CONFIGURATION" $env:CONFIGURATION;
 	}