New feature: Deprecations (#794)
New feature: Deprecations (#794)

* [Deprecation] Added deprecation policy.

* [Deprecations] Adding active and complete deprecations with (example) entry.

* [Deprecations] Correcting capitalization.

* [Deprecations] Corrections to subheaders in deprecations list.

* [Deprecations] Correcting example text.

* [Deprecations] Moving from a manual list of deprecations to Issues.

* [ActivityIndicator] Implement intrinsicContentSize (#795)

The `intrinsicContentSize` is computed based on the radius and the stroke width to encompass the indicator.

This fixes https://github.com/google/material-components-ios/issues/792.

* [Deprecations] Changes to policy doc from PR notes.

* [Deprecations] Changes to policy reflecting releasing.

* Section on versioning has better instructions on when to do what with the version numbers.

chriscox/material-components-ios,Eccelor/material-components-ios,willlarche/material-components-ios,samnm/material-components-ios,material-components/material-components-ios,samnm/material-components-ios,sigito/material-components-ios,brianjmoore/material-components-ios,Eccelor/material-components-ios,sigito/material-components-ios,willlarche/material-components-ios,Eccelor/material-components-ios,material-components/material-components-ios,randallli/material-components-ios,willlarche/material-components-ios,Eccelor/material-components-ios,brianjmoore/material-components-ios,samnm/material-components-ios,randallli/material-components-ios,chriscox/material-components-ios,chriscox/material-components-ios,material-components/material-components-ios,material-components/material-components-ios,material-components/material-components-ios,samnm/material-components-ios,brianjmoore/material-components-ios,chriscox/material-components-ios,samnm/material-components-ios,randallli/material-components-ios,randallli/material-components-ios,sigito/material-components-ios,randallli/material-components-ios,randallli/material-components-ios,willlarche/material-components-ios,brianjmoore/material-components-ios,Eccelor/material-components-ios,willlarche/material-components-ios,chriscox/material-components-ios,brianjmoore/material-components-ios,sigito/material-components-ios,sigito/material-components-ios