Include orchestra/notifier and update orchestra/support changelog.

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Update changelog.

Signed-off-by: crynobone <crynobone@gmail.com>
Update changelog.

Signed-off-by: crynobone <crynobone@gmail.com>
Update changelog.

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Update installation guide for 2.1

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Update changelog.

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Add template for creating issue.

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Fixed typo.

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Restructure contributing doc.

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Add toc and update list of available events.

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Update facade.

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Update title.

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Update auth usage doc.

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Update installation guide.

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Update changelog.

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Update upgrading guide.

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Update title.

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Upgrading detail.

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Update ToC.

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Add code regarding Theme::asset() helper.

Signed-off-by: crynobone <crynobone@gmail.com>