Vsts-cli

Feedback Ticket [320625](https://developercommunity.visualstudio.com/content/problem/320625/vsts-cli-can-i-pass-a-variable-that-is-not-sub-par.html): Fixes an issue with `variables` argument value parsing in the `vsts build queue` command.

Addresses Issue 160: The `vsts code pr create` and `vsts code pr update` commands now allow you to set multiple line descriptions by sending a value for each line. For example: `--description "First Line" "Second Line"`

Addresses Issue 202: Updated Banner Type column header to match argument.

Fixes an issue where the Universal Packages feature returned an error on Python 3.4 and 3.5.

This release adds a new set of commands including vsts package universal publish and vsts package universal download to support uploading and downloading Universal Packages from VSTS Package Management.

We've also added a new set of admin commands, which allow you to work with and manage Visual Studio Team Services banners.

There were also other minor fixes.

This release is a bug fix release:

+ Fixes issue where a user can inadvertently put private data into an argument name which would be included in usage telemetry. Argument names are included in telemetry, but argument values are not. This allows us to make investment decisions based on how customers use the CLI. Before this fix a customer could inadvertently send an argument value as an argument name, and that data would be collected and stored in telemetry for a 4 week period. With this fix, we ensure all argument names are valid argument names before reporting the telemetry. If there are any invalid argument names, then no telemetry is sent. This eliminates any chance of inadvertently including private data in the telemetry. Users have always been able to opt out of telemetry collection by using the `configure` command.

+ Fixes issue where `vsts -v` or `vsts --version` no longer worked with latest version of pip due to the use of a deprecated pip API.

+ Fix build command table output when build has no source branch.

+ Change name of --source-branch arg to just --branch on build queue command for consistancy and ease of use.

+ Improved error messaging when project is not specified but is required.

+ Performance improvements when calling commands with the `--help` or `-h` argument, by delaying imports to reduce unnecessary module loading.

+ Improved error messages when queueing a build fails.

+ Dependency updates and reaction

+ Other minor fixes.

Fix to pin version of knack to 0.2.0, before the 0.3.0 knack release.

Quick follow-up to the initial public release.

* Fixed issue where VSTS CLI would throw an error with certain commands (like `vsts configure`) if Git was not installed or available in the $PATH.

Initial public release