oscit Values nearly over

[Gaspard Bucher]

Just a quick note (it's late) to inform you that the following Value
types are now implemented and tested in liboscit:
* real (typedef for float or double)
* string
* error
* list (array of Values)
* hash (dictionary of std::string => Value)
* matrix (wrapper around opencv cv::Mat)

After a lot of struggling, I decided to use opencv's matrix format for
all matrix operations because:
1. it's very portable and actively maintained
2. the license is compatible with rubyk
3. opencv integration is good anyway because it will allow us to do
crazy things (matrix operations, image processing, machine learning)

The big work on liboscit is nearly over (missing midi value). It
should be possible to start working on rubyk again quite soon.

Thanks again to Vadim on the opencv mailing list for patiently
answering my stupid newbie questions....

Gaspard