Generate static exercise README templates

We are working towards making exercises stand-alone. That is to say: no more generating READMEs on the fly.

This will give maintainers more control over each individual exercise README, and it will also make some of the backend logic for delivering exercises simpler.

The README template uses the Go text/template package, and the default templates generate the same READMEs as we have been generating on the fly.  See the documentation in [regenerating exercise readmes][regenerate-docs] for details.

The READMEs can be generated at any time using a new 'generate' command in configlet. This command has not yet landed in master or been released, but can be built from source in the generate-readmes branch on [configlet][].

[configlet]: https://github.com/exercism/configlet
[regenerate-docs]: https://github.com/exercism/docs/blob/master/maintaining-a-track/regenerating-exercise-readmes.md

exercises/hello-world/README.md

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+# Hello World
+
+The classical introductory exercise. Just say "Hello, World!".
+
+["Hello, World!"](http://en.wikipedia.org/wiki/%22Hello,_world!%22_program) is
+the traditional first program for beginning programming in a new language
+or environment.
+
+The objectives are simple:
+
+- Write a function that returns the string "Hello, World!".
+- Run the test suite and make sure that it succeeds.
+- Submit your solution and check it at the website.
+
+If everything goes well, you will be ready to fetch your first real exercise.
+
+## Getting Started
+
+For installation and learning resources, refer to the
+[exercism help page](http://exercism.io/languages/coq).
+
+## Checking the solution (testing everything)
+
+To see if your solution works you just need to compile every file.
+
+```bash
+coqc *.v
+```
+
+There is no additional testing step needed as we can offload all testing to the type checker!
+
+## Feedback, Issues, Pull Requests
+
+The [exercism/coq](https://github.com/exercism/coq) repository on
+GitHub is the home for all of the Coq exercises.
+
+If you have feedback about an exercise, or want to help implementing a new
+one, head over there and create an issue.  We'll do our best to help you!
+
+## Source
+
+This is an exercise to introduce users to using Exercism [http://en.wikipedia.org/wiki/%22Hello,_world!%22_program](http://en.wikipedia.org/wiki/%22Hello,_world!%22_program)
+
+## Submitting Incomplete Solutions
+It's possible to submit an incomplete solution so you can see how others have completed the exercise.

exercises/rna-transcription/README.md

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+# Rna Transcription
+
+Given a DNA strand, return its RNA complement (per RNA transcription).
+
+Both DNA and RNA strands are a sequence of nucleotides.
+
+The four nucleotides found in DNA are adenine (**A**), cytosine (**C**),
+guanine (**G**) and thymine (**T**).
+
+The four nucleotides found in RNA are adenine (**A**), cytosine (**C**),
+guanine (**G**) and uracil (**U**).
+
+Given a DNA strand, its transcribed RNA strand is formed by replacing
+each nucleotide with its complement:
+
+* `G` -> `C`
+* `C` -> `G`
+* `T` -> `A`
+* `A` -> `U`
+
+## Getting Started
+
+For installation and learning resources, refer to the
+[exercism help page](http://exercism.io/languages/coq).
+
+## Checking the solution (testing everything)
+
+To see if your solution works you just need to compile every file.
+
+```bash
+coqc *.v
+```
+
+There is no additional testing step needed as we can offload all testing to the type checker!
+
+## Feedback, Issues, Pull Requests
+
+The [exercism/coq](https://github.com/exercism/coq) repository on
+GitHub is the home for all of the Coq exercises.
+
+If you have feedback about an exercise, or want to help implementing a new
+one, head over there and create an issue.  We'll do our best to help you!
+
+## Source
+
+Rosalind [http://rosalind.info/problems/rna](http://rosalind.info/problems/rna)
+
+## Submitting Incomplete Solutions
+It's possible to submit an incomplete solution so you can see how others have completed the exercise.

exercises/tautology/README.md

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+# Tautology
+
+Let us start by proving something we already know is true.
+
+## Getting Started
+
+For installation and learning resources, refer to the
+[exercism help page](http://exercism.io/languages/coq).
+
+## Checking the solution (testing everything)
+
+To see if your solution works you just need to compile every file.
+
+```bash
+coqc *.v
+```
+
+There is no additional testing step needed as we can offload all testing to the type checker!
+
+## Feedback, Issues, Pull Requests
+
+The [exercism/coq](https://github.com/exercism/coq) repository on
+GitHub is the home for all of the Coq exercises.
+
+If you have feedback about an exercise, or want to help implementing a new
+one, head over there and create an issue.  We'll do our best to help you!
+
+## Source
+
+Coq classics
+
+## Submitting Incomplete Solutions
+It's possible to submit an incomplete solution so you can see how others have completed the exercise.