Update merge for better composer support, error checking, compactness and correctness (#737)

* Initial check-in.

* Allof Working.

* Move definitions local.

* Launch to sdk.

* Everything working for new merge.

* schema: working

* Working except that allof expansion does not expand
local references.

* Simplification and some analysis working.

* Add extends.

* Everything working.

* Update help

* Fix typo

* Expand allOf and validate final schema.

* Missing as warning and validate schema.

* Update tests.

* Update test to pass on server.

* Normalize paths.

* Check normalize for mac

* Update for mac paths and lint.

* Address review comments.

Author: Chris McConnell

.vscode/launch.json

@@ -4,24 +4,6 @@
     // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
     "version": "0.2.0",
     "configurations": [
-        {
-            "type": "node",
-            "request": "launch",
-            "name": "Public bf cli",
-            "program": "C:/Users/chrimc/AppData/Roaming/npm/node_modules/@microsoft/botframework-cli/bin/run",
-            "args": [
-                "dialog:generate",
-                "c:/tmp/sandwich/sandwich.schema",
-                "-o",
-                "${env:TEMP}/cli.out"
-            ],
-            "outFiles": [
-                "C:/Users/chrimc/AppData/Roaming/npm/node_modules/@microsoft/botframework-cli/node_modules/@microsoft/bf-dialog/lib"
-            ],
-            "skipFiles": [
-                "<node_internals>/**"
-            ]
-        },
         {
             "type": "node",
             "request": "launch",
@@ -34,7 +16,7 @@
                 "999999",
                 "--colors",
                 "-g",
-                ".*"
+                ".*dialog:merge.*"
             ],
             "internalConsoleOptions": "openOnSessionStart",
             "outputCapture": "std",
@@ -62,26 +44,6 @@
                 "./package/dialog/lib/**"
             ]
         },
-        {
-            "type": "node",
-            "request": "launch",
-            "name": "Dialog Generator Tests",
-            "preLaunchTask": "${defaultBuildTask}",
-            "program": "${workspaceFolder}/packages/dialog/node_modules/mocha/bin/_mocha",
-            "cwd": "${workspaceFolder}/packages/dialog",
-            "args": [
-                "--timeout",
-                "999999",
-                "--colors",
-                "-g",
-                ".*dialog:generate.*"
-            ],
-            "internalConsoleOptions": "openOnSessionStart",
-            "outputCapture": "std",
-            "outFiles": [
-                "./package/dialog/lib/**"
-            ]
-        },
         {
             "type": "node",
             "request": "launch",
@@ -155,14 +117,52 @@
             ],
             "args": [
                 "dialog:merge",
-                "../libraries/**/*.schema",
+                "libraries/**/*.schema",
+                "-o",
+                "${env:TEMP}/sdk.schema",
+                "--verbose"
+            ],
+            "internalConsoleOptions": "openOnSessionStart",
+            "cwd": "${workspaceFolder}/../botbuilder-dotnet"
+        },
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "BotBuilder project",
+            "preLaunchTask": "${defaultBuildTask}",
+            "program": "${workspaceFolder}/packages/dialog/bin/run",
+            "outputCapture": "std",
+            "outFiles": [
+                "./packages/dialog/lib/**"
+            ],
+            "args": [
+                "dialog:merge",
+                "tests/Microsoft.Bot.Builder.Dialogs.Declarative.Tests/*.csproj",
+                "-o",
+                "${env:TEMP}/app.schema"
+            ],
+            "internalConsoleOptions": "openOnSessionStart",
+            "cwd": "${workspaceFolder}/../botbuilder-dotnet"
+        },
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Dialog merge test schema",
+            "preLaunchTask": "${defaultBuildTask}",
+            "program": "${workspaceFolder}/packages/dialog/bin/run",
+            "outputCapture": "std",
+            "outFiles": [
+                "./packages/dialog/lib/**"
+            ],
+            "args": [
+                "dialog:merge",
+                "schemas/*.schema",
                 "-o",
-                "sdk.schema",
-                "--verbose",
-                "-u"
+                "schemas/app.schema",
+                "-d"
             ],
             "internalConsoleOptions": "openOnSessionStart",
-            "cwd": "${workspaceFolder}/../botbuilder-dotnet/schemas"
+            "cwd": "${workspaceFolder}/packages/dialog/test/commands/dialog"
         },
         {
             "type": "node",