Handlebar AST to original template string

[satyajitnayk]

Hey @jaylinski. I have implemented a method here converts handlebar AST back to original template string.
I also have added several test cases to verify this & working on few more tests.

[jaylinski]

Nice work! Can you open a PR and add it to the readme (handlebars in the wild)?

[satyajitnayk]

sure! will do that @jaylinski

[satyajitnayk]

#2019