Returned the thread with pthread_exit function.

Changed the #ifndef #define macro of the CAN library to avoid conflicts with system libraries.

Added a virtual CAN driver to use CAN dump files offline. It may be usefull to test CAN based drivers without the actual device.
Added an example of use of this new Virtual CAN device.

Solved a problem that increased the number of errors when two ore more instances of the CCAN object were created in the same process. The internal thread function had an static variable which was shared by all the instances.

Solved a problem with the input arguments. The input arguments are checked before being used to avoid errors.

Solved a problem when the socket client was remotelly closed. The corresponding event was active even after calling the close() function.

Changed the UDP examples.

Added a send and receive examples for the UDP sockets.

Solved a problem when multiple processes using the FTDIServer were executed concurrently. The information returnes by the FT_GetDeviceInfoList() function was incomplete and generated errors.
Now the bus is rescaned at random intervals when there are such conditions to refresh the device list.

Solved a problem when the FTDI device could not be properly opened. The device was not destroyed and therefore the internal resources were not freed, which make it impossible to create the device 
classes again (the events were not properly removed from the server).

Added a special configuration of the ftdi module for high speed communications.

TO DO:
  - implement and test the reception filters.
  - implement and test the data request operation
Added examples for the basic read/write operation.