Call to g_caster function have been replaced by call to
    SignalCaster::getInstance.

Code cleaning after rewriting (marginal) of sig-cast. Introduction of a specific tracer behaviour for matrix and vector.

    * include/dynamic-graph/signal-caster.h,
    * src/signal/signal-caster.cpp.

	 * src/signal/signal-caster.cpp: cut long lines for function
	   SignalCaster::registerCast.

     * src/signal/signal-caster.cpp.

     * include/dynamic-graph/signal-caster.h,
     * src/signal/signal-caster.cpp: if a typename is registered several times,
     throw only if pointers to type_info differ. When loading python modules,
     for some reason, global variables are constructed several times.

    * src/signal/signal-caster.cpp.

     * src/signal/signal-caster.cpp.

    * src/signal/signal-caster.cpp.

     * src/signal/signal-caster.cpp: when type is not registered.

    * src/signal/signal-caster.cpp.

Added boost::ublas::vector example to test_signalcast.

Added unit test of the signal casting facility. Not exporting the SignalCastRegister class anymore (inlined in the .h).

* New class SignalCaster
* Re-added the get, set and trace commands to signals

Renamed dynamic-graph-API.h to dynamic-graph-api.h in every header file.

The package name is now dynamic-graph (this still needs to be changed in the git repository). Updated source files to reflect that change. Clarified CMakeLists, explicited cpp source files for libraries.

(dynamicGraph/ -> dynamic-graph/)

Configured dynamicGraph package and cmake files. Last-minute adjustment to code for SOT separation (SOT Break)