- fix typo in readme - remove unneeded extern declaration - fix header guard macro - tabs->spaces in syscalls.c (+1 squashed commit) - fix minor typos
- spaces->tabs in tasks.c - update vfs_uart.c to use per-UART locks - add license to vfs_uart.c - allocate separate streams for stdout, stdin, stderr, so that they can be independently reassigned - fix build system test failure