Globus-cli

Enhancements:

* Add support for `GLOBUS_SDK_ENVIRONMENT="preview"`

Enhancements:

* Better errors when installation onto python2.6 is attempted (https://github.com/globus/globus-cli/pull/362[362])
* Improve validation of Endpoint `--network-use` (https://github.com/globus/globus-cli/pull/361[361])

Bugfixes:

* Generate delegate proxy certs using UTC, not local time (https://github.com/globus/globus-cli/pull/360[360])

Bugfixes:

* Improve handling of non-ascii user names (https://github.com/globus/globus-cli/pull/354[354])

Enhancements:

* Allow enabling or disabling the "managed" state of an endpoint via the `--managed`, `--no-managed`, and
`--subscription-id` options to the `globus endpoint update` command.

Enhancements:

* Improved autoactivation error messages. (https://github.com/globus/globus-cli/pull/296[296])

Bugfixes:

* Handle "control-c" interrupts while doing the browser based login flow. (https://github.com/globus/globus-cli/pull/320[320])

Enhancements:

* Use the `cryptography` package instead of `M2Crypto` for the
`delegate-proxy` feature.
** Note: If you are using the `delegate-proxy` feature and
previously installed the CLI along with `M2Crypto`, you
will need to activate the CLI's virtualenv and install
the `cryptography` dependency:

source $HOME/.globus-cli-virtualenv/bin/activate
pip install globus-cli[delegate-proxy] --upgrade
deactivate