Add descriptions to cake tasks

Author: RehanSaeed

build.cake

@@ -20,6 +20,7 @@ var artefactsDirectory = Directory("./Artefacts");
 var versionSuffix = string.IsNullOrEmpty(preReleaseSuffix) ? null : preReleaseSuffix + "-" + buildNumber.ToString("D4");
 
 Task("Clean")
+    .Description("Cleans the artefacts, bin and obj directories.")
     .Does(() =>
     {
         CleanDirectory(artefactsDirectory);
@@ -28,13 +29,15 @@ Task("Clean")
     });
 
 Task("Restore")
+    .Description("Restores NuGet packages.")
     .IsDependentOn("Clean")
     .Does(() =>
     {
         DotNetCoreRestore();
     });
 
 Task("Build")
+    .Description("Builds the solution.")
     .IsDependentOn("Restore")
     .Does(() =>
     {
@@ -49,6 +52,7 @@ Task("Build")
     });
 
  Task("RunTool")
+    .Description("Downloads the latest schema.org JSON-LD and re-generates the C# classes from them.")
     .IsDependentOn("Build")
     .Does(() =>
     {
@@ -64,6 +68,7 @@ Task("Build")
     });
 
 Task("Test")
+    .Description("Runs unit tests and outputs test results to the artefacts directory.")
     .DoesForEach(GetFiles("./Tests/**/*.csproj"), project =>
     {
         DotNetCoreTest(
@@ -80,6 +85,7 @@ Task("Test")
     });
 
 Task("Pack")
+    .Description("Creates NuGet packages and outputs them to the artefacts directory.")
     .Does(() =>
     {
         DotNetCorePack(
@@ -97,6 +103,7 @@ Task("Pack")
     });
 
 Task("Default")
+    .Description("Cleans, restores NuGet packages, builds the solution, runs unit tests and then creates NuGet packages.")
     .IsDependentOn("Build")
     .IsDependentOn("Test")
     .IsDependentOn("Pack");