Update manifest data.
Initial port to Gazebo 1.4.

- Update empty world to SDF 1.3.

- Add model database for REEM, including version with RGBD sensor.
  This required generating URDFs with xacro and symlink to meshes
  folder.

- Add scripts for launching standalone Gazebo, and for spawning
  models from roslaunch.
Add partial robot subassemblies to model database.

- Added subassemblies: arm, head and upper-body.
Update ignored files.
Add missing package dependencies.
Add missing package dependencies.
Update controller gains. Consistent file names.
Trivial typo and whitespace fix.
Doc fix.
Factor out scripts elsewhere.

- They have been moved to a single location in a different package  to avoid
  code duplication.
SDF version update.
Migrate launch scripts to use standalone Gazebo.