Increment API version to 1.1

Make proper adjustments to documentation and qmldir files to remain
backwards compatible with the applications still using the 1.0 version.

Change-Id: I0a59065b09d4a0e60798629e98a0867c66b8dac8
Reviewed-by: Mitch Curtis <mitch.curtis@digia.com>
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>