Reorganized WiFi bridge folder and added Windows serial testing utility

wifi_bridge/SerialEchoConsole/.gitignore

wifi_bridge/SerialEchoConsole/SerialEchoConsole.sln

wifi_bridge/SerialEchoConsole/SerialEchoConsole/Packet.cpp

wifi_bridge/SerialEchoConsole/SerialEchoConsole/Packet.hpp

wifi_bridge/SerialEchoConsole/SerialEchoConsole/ReadMe.txt

...SerialEchoConsole/SerialEchoConsole/SerialEchoConsole.cpp

...alEchoConsole/SerialEchoConsole/SerialEchoConsole.vcxproj

...bridge/SerialEchoConsole/SerialEchoConsole/SerialPort.cpp

wifi_bridge/SerialEchoConsole/SerialEchoConsole/SerialPort.h

wifi_bridge/SerialEchoConsole/SerialEchoConsole/stdafx.cpp

wifi_bridge/SerialEchoConsole/SerialEchoConsole/stdafx.h

wifi_bridge/SerialEchoConsole/SerialEchoConsole/targetver.h

wifi_bridge/simple_bridge/simple_bridge.ino

wifi_bridge/simple_bridge/tcp_corrup_test.py

wifi_bridge/wifi_dropin_old/circ_buffer.c

wifi_bridge/wifi_dropin_old/circ_buffer.h

...idge/wifi_dropin_old/wifi_dropin_before_debug_changes.ino

wifi_bridge/wifi_dropin_old/wifi_dropin_old.ino