updated documentation
pack versioning is now controlled by metadata.json/version
[all] updated metadata.json to reflect current build versioning.
minor aesthetic fix
[ar] merged contribution from Tõnis Kängsepp, from nortal.com
[ar] added forgotten files
deleted spurious files
[ar] added pivot4j messages
[ar] added forgotten files
[pt_BR] removed spurious file
[all] included XUL related files
Translate update message files.