GUACAMOLE-2055: Add Turkish translation and keyboard layout.

[Turab]

No description provided.

[necouchman]

@Turab : I haven't reviewed the actual changes, yet, but, just looking at the pull request, the commit messages need some work:

• Each commit message needs the GUACAMOLE-2055: tag prepended to it.
• The commit messages need to be descriptive of the actual changes, beyond just things like Fix typo, etc. If you have trouble generating a commit message that's not an exact description of the changes made (Fix typo on line 31 in file tr.json), then consider squashing commits together. For some examples and hints, we recommend the following page: https://www.codelord.net/2015/03/16/bad-commit-messages-hall-of-shame/.

[necouchman]

A few general comments for the translations:

• For items that you are not providing translations, you can exclude them from the tr.json files completely - the translation system will automatically fall back to the English translations.
• If you are translating them, and the Turkish translation just happens to be identical to the English translation, please do include those.
• Please make sure to put/keep the items in alphabetical order - e.g. INFO_A should be before INFO_B.

[Turab]

I removed the tr.json files and their reference in manifest files where the only string was the exact same equivalent with English and I squahsed all the commit.