Bump version + Various fixes for assembly definition files:

- Re-create meta files due to some cache going bad
- Add missing references
- Move tests outside of HD folder (can go into HD package, but must be in its own assembly with test references enabled if so)
- Put core shader include path class into own assembly, such that C# errors do not break shader compilation
- Update PostProcessing to latest, which also has had its asmdef meta files regenerated

ScriptableRenderPipeline/Core/Editor/com.unity.render-pipelines.core.Editor.asmdef

 {
     "name": "com.unity.render-pipelines.core.Editor",
     "references": [
-      "com.unity.render-pipelines.core.Runtime"
+      "com.unity.render-pipelines.core.Runtime",
+      "com.unity.postprocessing.Runtime",
+      "com.unity.postprocessing.Editor"
     ],
     "includePlatforms": [
         "Editor"

ScriptableRenderPipeline/Core/Editor/com.unity.render-pipelines.core.Editor.asmdef.meta

 fileFormatVersion: 2
-guid: c4e3cd69a3c360d48a99df7c24d23ebb
+guid: 3eae0364be2026648bf74846acb8a731
 AssemblyDefinitionImporter:
   externalObjects: {}
   userData: 

ScriptableRenderPipeline/Core/com.unity.render-pipelines.core.Runtime.asmdef

 {
     "name": "com.unity.render-pipelines.core.Runtime",
     "references": [
-      "com.unity.postprocessing.Runtime"
+        "com.unity.postprocessing.Runtime"
+    "optionalUnityReferences": [],
     "includePlatforms": [],
     "excludePlatforms": []
 }

ScriptableRenderPipeline/Core/com.unity.render-pipelines.core.Runtime.asmdef.meta

 fileFormatVersion: 2
-guid: 566aaa1bfa8d0d945a265235d258aaf4
+guid: df380645f10b7bc4b97d4f5eb6303d95
 AssemblyDefinitionImporter:
   externalObjects: {}
   userData: 

ScriptableRenderPipeline/Core/package.json

 {
     "name": "com.unity.render-pipelines.core",
     "description": "Core library for Unity render pipelines.",
-    "version": "0.1.14",
+    "version": "0.1.20",
-        "com.unity.postprocessing": "0.1.5"
+        "com.unity.postprocessing": "0.1.7"
     }
 }

ScriptableRenderPipeline/HDRenderPipeline/Editor/com.unity.render-pipelines.high-definition.Editor.asmdef.meta

 fileFormatVersion: 2
-guid: 063161d55c643a04989f30f1b174c1e3
+guid: 78bd2ddd6e276394a9615c203e574844
 AssemblyDefinitionImporter:
   externalObjects: {}
   userData: 

ScriptableRenderPipeline/HDRenderPipeline/com.unity.render-pipelines.high-definition.Runtime.asmdef.meta

 fileFormatVersion: 2
-guid: 99af834ec55110a4aa01d28dadfe93bb
+guid: 457756d89b35d2941b3e7b37b4ece6f1
 AssemblyDefinitionImporter:
   externalObjects: {}
   userData: 

ScriptableRenderPipeline/HDRenderPipeline/package.json

 {
     "name": "com.unity.render-pipelines.high-definition",
     "description": "HD Render Pipeline for Unity.",
-    "version": "0.1.14",
+    "version": "0.1.20",
-        "com.unity.postprocessing": "0.1.5",
-        "com.unity.render-pipelines.core": "0.1.14"
+        "com.unity.postprocessing": "0.1.7",
+        "com.unity.render-pipelines.core": "0.1.20"
     }
 }

ScriptableRenderPipeline/LightweightPipeline/Editor/com.unity.render-pipelines.lightweight.Editor.asmdef.meta

 fileFormatVersion: 2
-guid: 1f561901d6b2e1142b55190074ee3490
+guid: c579267770062bf448e75eb160330b7f
 AssemblyDefinitionImporter:
   externalObjects: {}
   userData: 

ScriptableRenderPipeline/LightweightPipeline/com.unity.render-pipelines.lightweight.Runtime.asmdef.meta

 fileFormatVersion: 2
-guid: f9f2447b2da7506419c5b26f134724dc
+guid: 15fc0a57446b3144c949da3e2b9737a9
 AssemblyDefinitionImporter:
   externalObjects: {}
   userData: 

ScriptableRenderPipeline/LightweightPipeline/package.json

 {
     "name": "com.unity.render-pipelines.lightweight",
     "description": "Lightweight Render Pipeline for Unity.",
-    "version": "0.1.14",
+    "version": "0.1.20",
-        "com.unity.postprocessing": "0.1.5",
-        "com.unity.render-pipelines.core": "0.1.14"
+        "com.unity.postprocessing": "0.1.7",
+        "com.unity.render-pipelines.core": "0.1.20"
     }
 }

ScriptableRenderPipeline/master-package.json

 {
-    "version": "0.1.14",
+    "version": "0.1.20",
-        "com.unity.postprocessing": "0.1.5"
+        "com.unity.postprocessing": "0.1.7"
     },
     "subPackages": [
         "Core",

ScriptableRenderPipeline/Core/Editor/IncludePaths.meta

+fileFormatVersion: 2
+guid: 90bba9efc326ef140903dc14ef1b3a97
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

ScriptableRenderPipeline/Core/Editor/IncludePaths/com.unity.render-pipelines.core.IncludePaths.asmdef

+{
+    "name": "com.unity.render-pipelines.core.IncludePaths",
+    "references": [],
+    "includePlatforms": [
+        "Editor"
+    ],
+    "excludePlatforms": []
+}

ScriptableRenderPipeline/Core/Editor/IncludePaths/com.unity.render-pipelines.core.IncludePaths.asmdef.meta

+fileFormatVersion: 2
+guid: 7f1f241f7b44e6e4f89384a205d0586d
+AssemblyDefinitionImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: