Cleanup some of the gdocs --> md export output (googlecodelabs#83)

render: update tmpldata

The generated binary template data didn't seem to have been updated
to be inline with template.html. More specifically,
googlecodelabs@88dbc8f
wasn't picked up in the tmpldata.go.

This is required for Will's changes in googlecodelabs/codelab-components@f3e63d5
to have correct rendering on the official website.

Bumping version to tag and trigger CI's binary build and upload to
releases.

v1.0.3: support for alt and title in images

add support for image title and alt attributes (googlecodelabs#44)

* add support for image title and alt attributes

* fix review comments

* fix final review comments

Bump version to make sure everything is synched

Merge pull request googlecodelabs#38 from googlecodelabs/serve-fixes

claat serve: grey background and MS Windows fixes

Publish binaries on GitHub Releases page now

This bumps the version to v0.8.0.

Travis CI release deploy: try 3

Trying Travis CI release with skip_cleanup

Reduce num. of older versions of Go in Travis CI

We only need to support App Engine.
The rest should use the latest.