roby version 0.7.3 has been released!

# What is Roby ?

Roby is a plan manager: it allows to represent, execute and adapt a plan, which
is a representation of the past, present and future activities of a robot along
with the information needed to verify that their executin is going well, and to
manage errors.

Roby is:
* a task/event model in which one can represent the activities (Roby::Task) and
the noticeable situations during execution (Roby::EventGenerator,
Roby::Task.event).
* a set of task relations describing the interactions between the activities
(Roby::TaskStructure).
* a set of event relations describing the reaction the system should have in
response to some situations (Roby::EventStructure).
* error management tools which allow to catch errors during execution and
repair them (i.e. let the system manage the error).
* a mean to modify the plan as it is being executed (Roby::Transaction)
* (G)UI tools for interacting/controlling the living system.
* all of that in a multi-robot context.

See the README.txt file at http://roby.rubyforge.org for more
informations, including links to tutorials and demonstration videos

Changes:

### 0.7.3

* fix needed update to run on latest activesupport
This is probably the last release of 0.7. The 'next' branch will become 0.8 as
soon as it is tested enough