Update project.json to latest format

Reacting to https://github.com/aspnet/Announcements/issues/175

src/Npgsql.EntityFrameworkCore.PostgreSQL.Design/project.json

 {
   "version": "1.0.0-*",
-  "authors": [
-    "Shay Rojansky"
-  ],
-  "description": "Design-time Entity Framework Core Functionality for PostgreSQL",
-  "iconUrl": "http://www.npgsql.org/img/postgresql.gif",
-  "repository": {
-    "type": "git",
-    "url": "git://github.com/npgsql/npgsql"
+  "packOptions": {
+    "authors": [ "Shay Rojansky" ],
+    "description": "Design-time Entity Framework Core Functionality for PostgreSQL",
+    "iconUrl": "http://www.npgsql.org/img/postgresql.gif",
+    "licenseUrl": "https://raw.githubusercontent.com/npgsql/Npgsql.EntityFrameworkCore.PostgreSQL/dev/LICENSE.txt",
+    "repository": {
+      "type": "git",
+      "url": "git://github.com/npgsql/npgsql"
+    }
   },
-  "compile": "../Shared/*.cs",
-  "compilationOptions": {
+  "buildOptions": {
     "keyFile": "../../Npgsql.snk",
-    "warningsAsErrors": true
+    "warningsAsErrors": true,
+    "compile": {
+      "include": "../Shared/*.cs"
+    }
   },
   "dependencies" : {
     "Microsoft.EntityFrameworkCore": "1.0.0-rc2-*",

src/Npgsql.EntityFrameworkCore.PostgreSQL/project.json

 {
   "version": "1.0.0-*",
-  "authors": [
-    "Shay Rojansky"
-  ],
-  "description" : "PostgreSQL provider for Entity Framework Core",
-  "iconUrl": "http://www.npgsql.org/img/postgresql.gif",
-  "repository": {
-    "type": "git",
-    "url": "git://github.com/npgsql/npgsql"
+  "packOptions": {
+    "authors": [ "Shay Rojansky" ],
+    "description" : "PostgreSQL provider for Entity Framework Core",
+    "iconUrl": "http://www.npgsql.org/img/postgresql.gif",
+    "licenseUrl": "https://raw.githubusercontent.com/npgsql/Npgsql.EntityFrameworkCore.PostgreSQL/dev/LICENSE.txt",
+    "repository": {
+      "type": "git",
+      "url": "git://github.com/npgsql/npgsql"
+    }
   },
-  "compile": "../Shared/*.cs",
-  "compilationOptions": {
+  "buildOptions": {
     "keyFile": "../../Npgsql.snk",
-    "warningsAsErrors": true
+    "warningsAsErrors": true,
+    "compile": {
+      "include": "../Shared/*.cs"
+    }
   },
   "dependencies" : {
     "Microsoft.EntityFrameworkCore": "1.0.0-rc2-*",

test/Npgsql.EntityFrameworkCore.PostgreSQL.Design.FunctionalTests/project.json

 {
   "version": "0.0.0",
-  "content": [
-    "ReverseEngineering/**/*.expected",
-    "ReverseEngineering/**/*.sql"
-  ],
+  "buildOptions": {
+    "embed": {
+      "include": [
+        "ReverseEngineering/**/*.expected",
+        "ReverseEngineering/**/*.sql"
+      ]
+    }
+  },
   "dependencies": {
     "Microsoft.EntityFrameworkCore.Relational.Specification.Tests": "1.0.0-rc2-*",
     "Microsoft.EntityFrameworkCore.Relational.Design.Specification.Tests": "1.0.0-rc2-*",
     "Npgsql.EntityFrameworkCore.PostgreSQL.Design": "1.0.0-*",
-    "Npgsql.EntityFrameworkCore.PostgreSQL.FunctionalTests": "1.0.0-*"
+    "Npgsql.EntityFrameworkCore.PostgreSQL.FunctionalTests": "0.0.0-*"
   },
   "testRunner": "xunit",
   "frameworks": {

test/Npgsql.EntityFrameworkCore.PostgreSQL.FunctionalTests/project.json

 {
   "version": "0.0.0",
-  "content": "**/*.sql",
+  "buildOptions": {
+    "embed": {
+      "include": "**/*.sql"
+    }
+  },
   "dependencies": {
+    "dotnet-test-xunit": "1.0.0-*",
     "Microsoft.EntityFrameworkCore": "1.0.0-rc2-*",
     "Microsoft.EntityFrameworkCore.Relational": "1.0.0-rc2-*",
     "Microsoft.EntityFrameworkCore.Relational.Specification.Tests": "1.0.0-rc2-*",