Changes

Deploy the p2 repository to repository/latest/

The repository/ directory will be turned into a composite
repository [1]. This will allow multiple versions of the
plugins to be available from the same URL.

[1] https://wiki.eclipse.org/Equinox/p2/Composite_Repositories_%28new%29

Signed-off-by: Alexandre Montplaisir <alexmonthy@efficios.com>