added tex2img example.#4

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dzhuang wants to merge 3 commits intoinducer:mainfrom

dzhuang:tex2img

Commits on May 5, 2016

added tex2img example.
dzhuang
committed

Commits on May 6, 2016

remove is_full_code arg.
dzhuang
committed

Commits on May 31, 2016

update along with https://github.com/inducer/relate/pull/207
dzhuang
committed