* remove luaL_buffer from file_g_read()
- avoid memory leak when function gets terminated by lua_error
- skip scanning for end_char when reading until EOF
* attempt to free memory in any case
* Add FatFs
* enable BUILD_FATFS for all-module build
* push vfs into rest of firmware
* align maximum filename length
* increase timeout for acmd41 during card initialization
* switch from DOS to Unix path semantics chdrive() is substituted by chdir()
* update to fatfs R.012a incl. patches 1-6
* add callback for rtc provisioning in file
* update docs