SEP6200 Support
Cleanup and add licencse
modify codes for fractional divider
add NRZ feature on K60
fix a bug in rt_hw_uart_init() where u CAN NOT init some feature.
delete K60.pro
remove a var for INT_TX.
Merge pull request #135 from reynoldxu/K60Fxxxx

K60 fxxxx
Add ramfs into building script
Merge branch 'master' of https://github.com/RT-Thread/rt-thread
add device_open/close in mkfs
fix O_APPEND write issue in RAMFS
Merge pull request #132 from MrVan/sep6200

SEP6200 Support
Merge branch 'master' of https://github.com/RT-Thread/rt-thread
add buildlib for Keil MDK
remove compiling warning
Merge branch 'master' of https://github.com/RT-Thread/rt-thread
fix debug output of scheduler

When print the thread names, we should use "%.*s" instead of bare "%s".
Merge pull request #141 from grissiom/fix-schedule-debug

fix debug output of scheduler
device/pipe: add rt_pipe_{init,detach}

This provide the possibility that allocate the buffer of the ringbuffer
on a specific region, instead of always mallocing it. It also bring us
the benefit of using pipe device on the systems without heap.