Add initial amp-fit-text sample (#351)
Add initial amp-fit-text sample (#351)

* Add initial amp-fit-text sample

* Update amp-fit-text sample descriptions

* Change css class name to something more descriptive, put basic usage header on its own line

* Remove fixed and fill layout types

* Bugfix :)

* cosmetic changes

ampproject/amp-by-example,ampproject/amp-by-example,ampproject/amp-by-example,ampproject/amp-by-example