* added new boards
* corrected block size error
* added board to last commit working well
* override of readString for File class
Stream::readString requires a timeout of 1 seconds + multiple memory resize
* correct indent
return if size 0 before reserve
* correct indent
* good indent
* stricter test for end of string
* same implementation than Stream by replacing timeRead by read
* reading file by block of 256
* make sure there is an end of string
* fixed bug for file size multiple of 256
string::concate(char*) needs a string terminator to work
This includes empty stubs for most core Arduino functions.
Need to actually implement all those digital reads writes whatever.
Need to prebuild toolchains (xtensa-elf-lx106) for 3 platforms and put them on some download server.
Need to do the same with esptool.
Need to fix 0x40000 binary generation and add correct upload commands.
Maybe even implement uploads over WiFi.
