Added a vector version of the MORSE logo

(without the strange blue-yellow link)

Updated accordingly the png versions
[doc] Fix tag for socket

While here, fix a typo
[doc] Catch OSError in generate_doc
[doc] Fix various invalid link between documents
[doc] Fix a few issues in release note

- spelling
- use toctree for previous release
- fix some indentation issue

XXX releasenotes/0.6.rst is missing
[doc] Modify indexcontent to refer to morse 1.0
[doc] Add code to toctree to appease sphinx
[doc] Fix indentation + some spelling
Added a new ROS serialization for Pose sensor with TF

It exports the pose as a transformation between /map and /base_link

Example:

robot = ATRV()
pose = Pose()
robot.append(pose)
pose.add_interface("ros",
method='morse.middleware.ros.pose.TFPublisher')

While here, add a 'LocalizedPR2' configuration for the PR2 that uses
this sensor interface.
[doc] Add release notes of 0.6
[doc] Properly quote string (and in particular empty string)
[doc] Fix various rst issues in the component documentation
[doc] Calm sphinx for dev/adding_component

XXX Seems quite outdated
[doc] Fix link in creation armature documentation

While here, fix a few spelling issue
[doc] Don't reference old release in 0.6 release note