Update docs and bump to 0.5.1

Author: pcj

docs/subscribing.md

@@ -43,4 +43,13 @@ command from the palette or click the *Rocket* icon from the account view:
 
 ![get-started](https://user-images.githubusercontent.com/50580/95288941-d88f9500-0826-11eb-8d2e-b981ad2f2cab.gif)
 
-To view your account details or manage your subscription, proceed to <https://build.bzl.io/bzl/user>.
+To view your account details or manage your subscription, proceed to
+<https://build.bzl.io/bzl/user>.
+
+### Telemetry.
+
+This extension sends telemetry events to collect usage statistics on various
+features of the extension to help prioritize new features and/or diagnose
+problems.  No personal data is collected.  To opt out of telemetry, set the
+`telemetry.enableTelemetry` to `false` (this is the same flag for vscode
+telemetry itself).

package.json

@@ -2,7 +2,7 @@
     "name": "bazel-stack-vscode",
     "displayName": "bazel-stack-vscode",
     "description": "Bazel Support for Visual Studio Code",
-    "version": "0.5.0",
+    "version": "0.5.1",
     "publisher": "StackBuild",
     "license": "Apache-2.0",
     "icon": "stackb-full.png",