v2.0.5 - Patch - Explorable target and communication fixes

Changelog:
-added double quotes around all paths to allow for spaces in windows usernames
-moved -MMD to extra flags, removed it from .cxx-flags, and .c-flags
-Fixed SPI compilation error
-Updates mbed submodule (includes path change for an include for EEPROM)
-Workaround serial error on Nano