Added host endianness management for AHB Uart Plugin.

Étiquette Patch 3 from Paul on spwplugin ajoutée à la révision cda6b4e8adc1

Functions added to the plugin to get the number of CCSDS packets transmitted (linked to the lfrcontrol plugin counter of TC transmitted, it is possible to flush the TC transmission before changing the spacewire link in use)

Étiquette Patch 2 from Paul on spwplugin ajoutée à la révision 6939a908c25c

timecodes added to the spw plugin

dsu3 wip

Étiquette Patch 1 from Paul on spwplugin ajoutée à la révision a4e9ba42be66

Functions added to the Python API: StarDundeeGetAvailableBrickCount StarDundeeSetBrickAsAninterface StarDundeeSetBrickAsARouter TCP Statistics udpated when packets are received or transmitted Spacewire statistics added router mode added for the STAR-Dundee Brick other minor modifications

Removed APBUartPlugin bug (when switching between debug and non debug link). Added APBUart Python wrapper.

Improved AHB UART Plugin, now check how many bytes are available on uart before reading.