Update to version of checkstyle and pmd connectors that cooperate with m2e 1.2.
Added the subversive connector to the 1.3 catalog.

Signed-off-by: Anders Hammar <anders@hammar.net>
Merge pull request #14 from andham/m2e-subversive_m2e-1.3

Added the subversive connector to the 1.3 catalog.
Merge pull request #9 from m2e-code-quality/master

Pick up newer release of the checkstyle and pmd connectors to enable 1.2.

You'll also need to make sure your plugins are compatible with m2e 1.3