Allow specifying the source and destination files' encodings in the template module
* Added output_encoding to the template module, default to utf-8
* Added documentation for the new variables
* Leveraged the encoding argument on to_text() and to_bytes() to keep the implementation as simple as possible
* Added integration tests with files in utf-8 and windows-1252 encodings, testing all combinations
* fix bad smell test by excluding windows-1252 files from the utf8 checks
* fix bad smell test by excluding valid files from the smart quote test
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