doc: add English release notes
Merge pull request #1 from grissiom/use-bsp-sim

more take use of bsp/simulator
Merge branch 'master' of github.com:RT-Thread/RTGUI into sim-dev-old
Merge branch 'sim-dev' of github.com:prife/RTGUI into sim-dev-old
simulator: add sim-common"
demo: simplify code in application.c
rtgui-sim: update SConstruct to add src in sim-common