prettify source language file

[MJacred]

New Feature

In case the user does not deliver a default translation within the code, but rather writes the source language file themselves:
A simple key-value pair is enough to specify the message template (e.g. active.en.toml):

MissingFile = "File is not in expected location: {{.Path}}"

The user might want to prettify this to look the same as the target active.*.* files (e.g. active.fr.toml):

[MissingFile]
other = "File is not in expected location: {{.Path}}"

or even

[MissingFile]
hash = "sha1-x"
other = "File is not in expected location: {{.Path}}"

This is also useful for comparing translations using the raw files => same file layout and sorting of key-value pairs, because they are now tables

pull request coming soon...