More global variable name changes for NuttX coding standards compatibility.  Make sure that g_bas_end is initially false

BAS: Fix another case were allocated pointer not being nullified and, hence, crashing the next time referenced after restarting BAS.  Also bring even more global varialbles and type names into NuttX coding standard

Need to nullify a pointer when BAS exits so that it is in the right state on restart.  Also bring a few global variables into the NuttX naming convention

BAS: Rename examples/bas to examples/bastest.  Hook into build and configuration system.  Finish ROMFS logic

BAS: Fix a GCC specific error.  Type of enums converted to int when passed to ... as variable argument